When i did this swap, to run fuel pump, i just grabbed a pink wire with the black tracer (several to choose from) that is keyed power and ran it to the fuel pump relay in place of the green wire with white tracer and it works pefect.
i did the swap on my 93 suburban 350 back in may been driving it to work everyday ..had to adjust and change a few things but its going very well my only issue is i wasnt sure where to set my timing its currently set at 12 degrees BTDC with no vacuum could be wrong but it runs fine with good power starts right up tranny shifts like normal and runs cool even with ac blasting ...i did this all myself from start to finish so i can surely give some answers to any questions if needed ..i used the holly carb tps bracket. edelbrock intake. holly fuel regulator set at 7psi and a new stock distributor i got all my parts from summit i was scared to death to try this change but once all the wiring made sense to me it was nothing
Howdy, I heard you say that you couldn't find any carb with a throttle position sensor other than holley. You know the q-jets that gm usedin the 80s had them, and those were good reliable carbs.
Hey nice video love the look of that Holley can you tell me about what all the parts cost when you swapped it over thinking about doing mine if it don't cost an arm and leg
I have a 94 GMC Sierra 1500 long bed with a 4.3. it's automatic and had a 4l60e trans. Had to put a trans in it when I got it, which I actually drugg it out of a field after it sat for 7 years, lol. So the trans went out again, exploded the 3/4 clutch pack, so I decided to try what many online said was gonna be so difficult. I put a completely nonelctronic 700r4 in it. After figuring out what I needed to it was really pretty simple. I didn't hookup the lockup because it's not needed. And ran a detent cable and ghetto rigged a stub in the throttle body plate using a bolt and two nuts and I was done. It takes driving for almost a half hour for the engine light to even kick and when I turn off the switch and restart I have no light. So I have a 350 on the engine stand that I'm gonna build and I was thinking about trying the next step and putting a fully carburated 350 in it. Any advice? And a tip for folks watchin this video. If you've done a trans swap to a nonelctronic trans like me then u can run any carb u want because you will no longer need the tps sensor because your gas pedal will now be linked to your transmission via the detent cable you installed. So goodbye TPS. Just a tip.
Thanks for showing this. I just bought a 94 with about 387,000 on the entire harness is hacked beyond belief; replacement will cost about $700 or between $300 and $1300 to refurbish. That alone negates keeping TBI. Did you have to do anything special to keep cruise or just the new bracket? All gauges work?
You don't actually have to have a throttle position sensor I've run old quadrajets and I've run Edelbrock on the same truck and as far as a pressure regulator you can just run a tee off from the existing fuel line run one line of that tea to the input of your car run the other one back to your tank and then between the t in the fuel tank on the return line at a hose clamp tighten that hose clamp until your carburetor gets the right amount of fuel you can let the truck sit there and run and slowly pinch that line off until I get too much fuel and then slowly loosen the clamp back up until you get the perfect and then you're all set to go these trucks are so easy to convert just got to run that wire to turn on that fuel pump and a hose clamp works for a great pressure regulator all you need is a carburetor adapter plate or carburetor intake a piece of gas line or use the existing return line a hose clamp and maybe a short piece of wire it's so cheap and simple it's not funny it took my dad almost two years to figure out how to do this back before it was a popular mod but he's just a backyard mechanic I looked at it for 10 minutes and figured it out and he drove his truck like that for the last 6 years and then I helped him do the same thing to his best friend's truck if he's been driving his truck for the last 5 years I put a factory quadrajet on my dad's and I put an Edelbrock 600 on his buddies truck
Hey Andrew, I noticed on the inlet to the fuel regulator you used a screw clamp to secure the rubber line you used. Did you cut and flare the supply line down by frame and add the rubber line I see? The clamps secure the rubber line enough with the 10 to 14 psi the electric pump generates?
got question for you ....i just rebuild my chevy 350 1990 k5 blazer i converted it over from tbi to carb ..i did a few up grade on the engine high performance intake headers 3' pipes all way back up graded the cam to a howard rattler cam 525 intake lift 535 exhaust duration 227/235 lobe separation 109 center line 103 i still the same factory heads on there i believe they the swirl port heads ..i no i should have went with some better heads but the engine was already done. i put a brand new 1406 edelbrock carb on it right out the box every sence i put that carb on there i been using alot of fuel i set the carb best as posible ..im using a awful lot of fuel just with it iding..i have my pressure regulator set at 5psi..dont no why im losing so mush fuel
I have a 89 Chevy Cheyenne with the stock 4.3l V6-Not Vortec and I am wondering if the Holley Street Warrior 600CFM carb will work for my truck. Thanks for the help. And by the way Great video!
u have the part # 4 the fuel pressure regulator - im about 2 swap a 1991 Suburban fuel tank (31 gallon) into an 81 K5 Blazer since im about 2 swap 2 a 5.7L which does not have a mechanical fuel pump (im using an OEM fuel pump relay and oil pressure switch along with a 20 amp fuse but im retaining the carb 4 a temporary reprieve where im about 2 swap a salvaged TBI wiring harness)
I have a 2000 Tahoe and I used a computer controlled quadajet 4 barrel carb and used the tps that's built into the carb. I just need to figure out what wire I need to send tach signal to for the trans to shift
Nice video .. i have 90 silverado 7.4 th400 and i slapped a holley in it and my question is do i need the ignition control module, tps , map sensor,oxygen sensor? Also on the fuel it runs but shuts off but if i step on the pedal it would stay on untill i let go so what can i do ?
Did you have problems with your fuel pressure regulator? How did you get your regular set and how did you hook it up? I'm pretty sure I have the same regulator but I can't get it up to 6psi
Nice truck I like your truck alot brother. I have a 95 k25 suburban. The ac won't turn on. I checked all the fuses and even tried switching the relays with another relay but still no luck. Could you help me out if you can? Thanks
What if the truck was stripped of the computer ? In other words I have an 87 the computer, motor etc was removed but, I want to run that electric in tank pump with a built carbd 350 ???
@@brendentaylor8976 Summit has after market in tank pumps as well as other places. You can use the 87 in tanks bracket that hangs the pump and then wire the pump to tach wire. After that put a fuel pressure regulator witha a gauge and a return and your set. Its easier to say than do but there are videos and tech out on it.
What does the TPS tell the pcu to do? Is it converter lock up? Or ? I'm putting old school BB 402 with turbo 400 trans from a 71 Chev pu. I'm thinking about 86ing the electric fuel pump too. My truck is 88 3500 dually that had EFI 454 turbo 400 that someone stole.
I need help on mine, I’m dropping a carb 454 into my 1996 Chevy truck with a tbi 350 do I just have to push a fuel pressure regulator on to get it to work? It is also a 5 speed I’d really appreciate your opinion.
Mpg stayed about the same. Depends on how you tune it also. It has a 350 with vortec heads and a Comp xr270hr roller cam, 2500 stall converter, 35's and 15x10 wheels, 6" rough country lift, 4.10 gears right now. Getting around 12 mpg.
Looks like a great job. I have a question about your carb. How many cfm and what size jets do you have in it? I'm running a 600 cfm Holley and it seems to be way too rich, bogs on off-idle acceleration. Thanks.
You need at least a 670 cfm carburetor for a stock 350, as for the Vortec 350 engines, 96 to 2002 with the vortec heads, I'd recommend at least a 700 cfm carburetor. Holley has a article on their website that explains everything you need to know about what size carburetor you need for specific engines. On the old 87 to 95 Chevy 350 TBI engines with the General Motors cluster-f'ked swirl heads will probably do fine with a 600 cfm carburetor.
@@alanwylie8960 you are 100% correct. However, at the time, this was my friend’s truck, he was getting the parts, and went against my recommendation on 3 main components: the headers, the intake, and the Carb. 670 quadrajet, spread-bore intake, and any headers that wouldn’t rust. He went with the opposite on all 3.
Appreciate the information. On the trans issue. Did the Crank Position Sensor play any part in the modification? I've seen people say you have to attach it to the Tach port to get the trans to shift properly.
Hey Jared, I still have the issues of it downshifting at highway speeds (only) and not upshifting until I shut the ignition off and turn it back on. I can't find anyone who seems to know the solution. It shifts fine through all the gears on the backroads, just not on the highway. I'm getting pretty good at rolling ignition resets!@@jaredaaenson9489
Forgive my ignorance, but the only wiring modification you had to do was that blue or purple wire from the 4 wire stock TBI dist plug to the tach section of the HEI ? I found a pigtail that should do the job but want to make sure of which wires to connect. I'm doing a similar build that I'm just about finished with and am working on deleting wiring I don't need and modifying what I do need. 1992 C1500 with a L31 5.7 Vortec Long Block with an LT4 Hotcam with a 600CFM vacuum secondary Summit Carb. 5 speed manual. Also, I may have missed it in the video but what did you use to adapt your stock fuel lines to the Adjustable FPR?
I just cut the green and white wire at the fuel pump relay and spliced it to a pink and black, all the pink and black wires I have found are 12 volt keyed.
Hey I got a question. I'm doing the swap on my 90 sierra using a 95 suburban 5.7. What wire did you use to supply your distributor with power. I'm thinking probably the red wire that went to the coil. Also when I turn my key on my fuel pump kicks on. Do I need that blue wire still hooked up to the tach spot on the distributor to keep the fuel pump running or would I have to worry about it since my fuel pump is already coming on. I have everything hooked up but it'll start up but then it dies even with me giving it gas with the throttle on carb. It's kinda sounding like it's running out of gas. I'm just curious if it needs the wire hooked up so the fuel pump knows to stay on.
After it dies, can you still hear the pump running? If not then I think you are on the right track. I am doing an 87 tbi to carb conversion and I was thinking this to myself.
Did every and the only problem I am having is the torque converter won't lock up. I checked my voltage at the tps, .5 volts at idle and about 4.5 at WOT. What all does the computer need to see and or have to send the signal to lock up?
Not sure if you figured it out yet but I had the same problem I had to run the purple and white wire from old distributor to tec side of hei that wire runs to the trans
What year did they go from carb to tip, will the carb wiring fit the later models? And does any part of the computer have to be retained? Will the factory gage's still work? And speedometer? My truck is a 1988, c,20 , 4 wheel drive automatic, 4 wheel shifter in the floor. Thanks.
Tbi started in 88 you won't need the computer all your gauges will work you'll need a different intake a fuel regulated and a HEI distributor with the right gear to match your Cam
They went to TBI in 87 with the trucks. The only signals I am sending to the factory computer are coolant temp, throttle position, and tach signal. Those and the factory speed sensor let the computer run the torque converter lockup and cruise control. The tach signal is to tell the computer that the engine is running to turn the fuel pump on.
I recently changed tbi to carb . Only problem I have now is after deadheading the wires other than the tps is the A/C compressor and A/C dash light are not getting power . Were 1 of the wires I cut a source for power to the compressor or pressure switches ?
@@bassplayaz06 I only cut wires that lead to TBI unit , coolant temp sensor left unplugged that was by thermostat and wired distributor as you did . I take it none of the wires going to TBI have anything to do with the Air conditioning ?
yeah, mine is controlled by the TV cable connected to the throttle. if you have a 93-95 then it's all electronically controlled by the throttle position sensor.
on 700r4's the shift point is controlled by the governor on the driver side of the case. The TPS will control at what throttle input the torque converter will lock at. You can change shift points by changing the weights and springs on the governor.
When I first did the swap I got a Holley street dominator carb intake that fit tbi heads. Here I have vortec heads with a Edelbrock performer carb intake
@@1eliaskno all regular small block intakes with fit Tbi heads that very used until 95. Have your pick of any intake manifold that is good for cubic inches, rpm range, and will mount the carb you wish to use. Engines that have heads that were designed for multi port injection (mpi) also called vortec heads will require a vortec to carb intake manifold. Like this one www.summitracing.com/parts/sum-226018
their is a way to turn off the check engine light, did this a while ago for a friends and experiment. forgot what fuse to un plug but that is literally all you gotta do that involves the map and somthing else. pretty much making your tbi wiring harness to a carburetor set up look it up in your owner manual you will find this. hope this helps?????
A little late, I pulled the ecu/ignition fuse because when I did the swap my check engine light went off therefore blew the fuse and after I replaced the fuse my truck started running rich and sounded like it had a vacuum leak. I took the fuse out and was good as new. No more problems. I don’t have an HEI distributor at the moment, still have the one with the coil on a bracket. I just put the carb in and got the fuel pressure regulator and turned the key.
Thank u for the video now my only question i i know u did a carb swap but im taken 4.3 its a 5speed but taken 4.3 out slapen my 355 in its place will it still work as far as like the wiring goes im pretty sure it will work but what would ure opinion be i know trans will work as well and the truck is a 91 short bed single cab
Mr. Clyde Im got the same project ongoing as well in the same model truck. Hows your project coming along and have you ran into any complications so far. Im removing the 4.3 in mine now and will be putting in a built sbc. What clutch kit did you purchase for the trans? Thanks in adavnce
Wes Lyons well thb the clutch flywheel and pressure plate will work on the 350 n bolt right up but ima go a different route with min n just do a four speed for now
My first set up all i had bought was an intake, carb, pressure regulator, and TPS kit. Holley 600 carb was $320, intake was $180, TPS kit (part # 534-202) was $122, regulator was $50.
Andrew, I put a 400 small block in my 1993 C 1500 with a carburetor. It has the 4L60E transmission. I bought the TPS kit from Holley and put it on the 600 cfm Holley. I have got the 5+ amps going to the TPS but I still can't get the transmission to shift correctly. I am not sure that the transmission was working properly to start with. What route would you suggest that I take next? I would really love to keep an overdrive transmission if at all possible. The 400 engine, actually a 406, acts like it is way down on power, maybe like the transmission has it in a bind. I know that it is not starting in low gear but I don't know what gear it is starting in. It only shifts one time.
@@jamesedwards3729 not 100% sure but its possible its the detent cable not allowing it to shift,often times it gets confused with a kick down cable but it is connected to a valve in the trans .has the same purpose as the vacuum valve on the 350t and the 400t ,minus the vacuum . just a thought.
@@jamesedwards3729 mine too its confusing have you found a solution i talked to holley and they said we need 2 more peices that cost 1000 to complete the setup
I just completed the same swap and my stock tach isn't working. Any wiring ideas?? Also, did you have to run octane boost? I now have a dieseling problem.
Check your ignition timing, or you could even have carbon on the pistons or heads causing that issue, or double check your fuel psi so that it's not too much
Fucking thank you. someone finally shows the right way to do this
When i did this swap, to run fuel pump, i just grabbed a pink wire with the black tracer (several to choose from) that is keyed power and ran it to the fuel pump relay in place of the green wire with white tracer and it works pefect.
You can use a remote tps sensor and use whatever you want for a carb.
Remote tps what’s that?
best info ive found, thanks
i did the swap on my 93 suburban 350 back in may been driving it to work everyday ..had to adjust and change a few things but its going very well my only issue is i wasnt sure where to set my timing its currently set at 12 degrees BTDC with no vacuum could be wrong but it runs fine with good power starts right up tranny shifts like normal and runs cool even with ac blasting ...i did this all myself from start to finish so i can surely give some answers to any questions if needed ..i used the holly carb tps bracket. edelbrock intake. holly fuel regulator set at 7psi and a new stock distributor i got all my parts from summit i was scared to death to try this change but once all the wiring made sense to me it was nothing
NUCLEAR BUM hey do you have parts list on all the parts your purchased from summit?
@@treyvisuals4224 sure do but im at work i will be glad to help you
NUCLEAR BUM thank you!!
So ur still using ur 4l60e/4l80e? I'm about to do this I just wanna make sure I'm going to be ok lol
@@trudymarsolek7939 any luck
Watch for the red wire that runs power to the old tbi injectors. That is the power to the ecm. I cut mine not knowing so I had to run a new wire
1995 Silverado with a 4l60e and I did put a 2200 stahl converter in as well
Howdy, I heard you say that you couldn't find any carb with a throttle position sensor other than holley. You know the q-jets that gm usedin the 80s had them, and those were good reliable carbs.
You don't need a throttle position sensor unless you have a 4l60e transmission!! If your trans is 700R4 you're good to go
Thank you for the video it Was a great help
Hey nice video love the look of that Holley can you tell me about what all the parts cost when you swapped it over thinking about doing mine if it don't cost an arm and leg
I have a 94 GMC Sierra 1500 long bed with a 4.3. it's automatic and had a 4l60e trans. Had to put a trans in it when I got it, which I actually drugg it out of a field after it sat for 7 years, lol. So the trans went out again, exploded the 3/4 clutch pack, so I decided to try what many online said was gonna be so difficult. I put a completely nonelctronic 700r4 in it. After figuring out what I needed to it was really pretty simple. I didn't hookup the lockup because it's not needed. And ran a detent cable and ghetto rigged a stub in the throttle body plate using a bolt and two nuts and I was done. It takes driving for almost a half hour for the engine light to even kick and when I turn off the switch and restart I have no light. So I have a 350 on the engine stand that I'm gonna build and I was thinking about trying the next step and putting a fully carburated 350 in it. Any advice? And a tip for folks watchin this video. If you've done a trans swap to a nonelctronic trans like me then u can run any carb u want because you will no longer need the tps sensor because your gas pedal will now be linked to your transmission via the detent cable you installed. So goodbye TPS. Just a tip.
Thanks for showing this. I just bought a 94 with about 387,000 on the entire harness is hacked beyond belief; replacement will cost about $700 or between $300 and $1300 to refurbish. That alone negates keeping TBI. Did you have to do anything special to keep cruise or just the new bracket? All gauges work?
I have a 95 TBI 454, did you get a transmission controller to run the transmission??
You don't actually have to have a throttle position sensor I've run old quadrajets and I've run Edelbrock on the same truck and as far as a pressure regulator you can just run a tee off from the existing fuel line run one line of that tea to the input of your car run the other one back to your tank and then between the t in the fuel tank on the return line at a hose clamp tighten that hose clamp until your carburetor gets the right amount of fuel you can let the truck sit there and run and slowly pinch that line off until I get too much fuel and then slowly loosen the clamp back up until you get the perfect and then you're all set to go these trucks are so easy to convert just got to run that wire to turn on that fuel pump and a hose clamp works for a great pressure regulator all you need is a carburetor adapter plate or carburetor intake a piece of gas line or use the existing return line a hose clamp and maybe a short piece of wire it's so cheap and simple it's not funny it took my dad almost two years to figure out how to do this back before it was a popular mod but he's just a backyard mechanic I looked at it for 10 minutes and figured it out and he drove his truck like that for the last 6 years and then I helped him do the same thing to his best friend's truck if he's been driving his truck for the last 5 years I put a factory quadrajet on my dad's and I put an Edelbrock 600 on his buddies truck
Hey Andrew, I noticed on the inlet to the fuel regulator you used a screw clamp to secure the rubber line you used. Did you cut and flare the supply line down by frame and add the rubber line I see? The clamps secure the rubber line enough with the 10 to 14 psi the electric pump generates?
The truck runs real nice
If folks are swapping a tbi 350 to carb you have to change the distributor. Don't go with a big cam if your running TBI HEADS! THE HEADS DONT FLOW
If you have a 700r4 automatic tranny you don’t need a tps
Did changing to the carb have any effect on the gauges? Looks like they all worked when you started the truck.
What is the part number for the carb, also the tps sensor ?
got question for you ....i just rebuild my chevy 350 1990 k5 blazer i converted it over from tbi to carb ..i did a few up grade on the engine high performance intake headers 3' pipes all way back up graded the cam to a howard rattler cam 525 intake lift 535 exhaust duration 227/235 lobe separation 109 center line 103 i still the same factory heads on there i believe they the swirl port heads ..i no i should have went with some better heads but the engine was already done. i put a brand new 1406 edelbrock carb on it right out the box every sence i put that carb on there i been using alot of fuel i set the carb best as posible ..im using a awful lot of fuel just with it iding..i have my pressure regulator set at 5psi..dont no why im losing so mush fuel
I have a 89 Chevy Cheyenne with the stock 4.3l V6-Not Vortec and I am wondering if the Holley Street Warrior 600CFM carb will work for my truck. Thanks for the help. And by the way Great video!
u have the part # 4 the fuel pressure regulator - im about 2 swap a 1991 Suburban fuel tank (31 gallon) into an 81 K5 Blazer since im about 2 swap 2 a 5.7L which does not have a mechanical fuel pump (im using an OEM fuel pump relay and oil pressure switch along with a 20 amp fuse but im retaining the carb 4 a temporary reprieve where im about 2 swap a salvaged TBI wiring harness)
www.summitracing.com/parts/qft-30-900qft
Part number for the tps bracket ?
Just wondering if I need to change from factory coil if i convert a 1994 4.3 tbi to a carburetor
These trucks run forever.
Good looking truck man
Hey andrew i got a 97 silverado 5.7 its only got three wires feeding into dizzy no blue just grey, pink nd pink with black stripe any tips appreciated
Where did that line from the top of valve cover run to
I have a 2000 Tahoe and I used a computer controlled quadajet 4 barrel carb and used the tps that's built into the carb. I just need to figure out what wire I need to send tach signal to for the trans to shift
Nice video .. i have 90 silverado 7.4 th400 and i slapped a holley in it and my question is do i need the ignition control module, tps , map sensor,oxygen sensor? Also on the fuel it runs but shuts off but if i step on the pedal it would stay on untill i let go so what can i do ?
If you are going to use a tachometer where do you connect the tach if you are already using the tach port for the fuel pump
You can splice both wires together to the same plug on the distributor. At least that's how I did mine.
@@bassplayaz06 i put this tps kit on my carb 4l60e set up and I only have I think 2nd and 3rd please help
What did you do about the gas pedal Cable throttlebody cable don’t work
I used the stud from the TBI and bolted it onto the carb throttle. I mounted both the throttle and cruise control to the same stud.
Did you have problems with your fuel pressure regulator? How did you get your regular set and how did you hook it up? I'm pretty sure I have the same regulator but I can't get it up to 6psi
Did you do anything to the alternator mine won't charge. Alternator tested out good
Ok thanks hopefully the carbrator will take care of the problems I'm having a make it run better
Nice truck I like your truck alot brother. I have a 95 k25 suburban. The ac won't turn on. I checked all the fuses and even tried switching the relays with another relay but still no luck. Could you help me out if you can? Thanks
What if the truck was stripped of the computer ? In other words I have an 87 the computer, motor etc was removed but, I want to run that electric in tank pump with a built carbd 350 ???
I wish someone would answer this
@@brendentaylor8976 Summit has after market in tank pumps as well as other places. You can use the 87 in tanks bracket that hangs the pump and then wire the pump to tach wire. After that put a fuel pressure regulator witha a gauge and a return and your set. Its easier to say than do but there are videos and tech out on it.
All my 6 liter chevy trucks only got about 12 or 13 on the highway.
what intake manifold are u using
Is there some other wiring you have to do to get ac to work?
What does the TPS tell the pcu to do? Is it converter lock up? Or ? I'm putting old school BB 402 with turbo 400 trans from a 71 Chev pu. I'm thinking about 86ing the electric fuel pump too. My truck is 88 3500 dually that had EFI 454 turbo 400 that someone stole.
Any thoughts on why it stayed on the sve light ?
hey do i have to change my intake on my 1994 4.3 vortec or can I just buy a holley for it
Does the a.c. still work?
I need help on mine, I’m dropping a carb 454 into my 1996 Chevy truck with a tbi 350 do I just have to push a fuel pressure regulator on to get it to work? It is also a 5 speed I’d really appreciate your opinion.
How much did it change your mpg. and what's the rim and tire setup as well as the lift.
Mpg stayed about the same. Depends on how you tune it also. It has a 350 with vortec heads and a Comp xr270hr roller cam, 2500 stall converter, 35's and 15x10 wheels, 6" rough country lift, 4.10 gears right now. Getting around 12 mpg.
How did you wire the 5v and all for the tps
Looks like a great job. I have a question about your carb. How many cfm and what size jets do you have in it? I'm running a 600 cfm Holley and it seems to be way too rich, bogs on off-idle acceleration. Thanks.
Tim G when I had a Holley 600 on the 350 I had those same problems. I put a 28 accelerator pump squirter and 65 jets. that seemed to help it a lot.
You need at least a 670 cfm carburetor for a stock 350, as for the Vortec 350 engines, 96 to 2002 with the vortec heads, I'd recommend at least a 700 cfm carburetor. Holley has a article on their website that explains everything you need to know about what size carburetor you need for specific engines. On the old 87 to 95 Chevy 350 TBI engines with the General Motors cluster-f'ked swirl heads will probably do fine with a 600 cfm carburetor.
@@alanwylie8960 you are 100% correct. However, at the time, this was my friend’s truck, he was getting the parts, and went against my recommendation on 3 main components: the headers, the intake, and the Carb. 670 quadrajet, spread-bore intake, and any headers that wouldn’t rust. He went with the opposite on all 3.
Appreciate the information. On the trans issue. Did the Crank Position Sensor play any part in the modification? I've seen people say you have to attach it to the Tach port to get the trans to shift properly.
Let me know I'm having this issue?
Hey Jared, I still have the issues of it downshifting at highway speeds (only) and not upshifting until I shut the ignition off and turn it back on. I can't find anyone who seems to know the solution. It shifts fine through all the gears on the backroads, just not on the highway. I'm getting pretty good at rolling ignition resets!@@jaredaaenson9489
Forgive my ignorance, but the only wiring modification you had to do was that blue or purple wire from the 4 wire stock TBI dist plug to the tach section of the HEI ? I found a pigtail that should do the job but want to make sure of which wires to connect.
I'm doing a similar build that I'm just about finished with and am working on deleting wiring I don't need and modifying what I do need.
1992 C1500 with a L31 5.7 Vortec Long Block with an LT4 Hotcam with a 600CFM vacuum secondary Summit Carb. 5 speed manual.
Also, I may have missed it in the video but what did you use to adapt your stock fuel lines to the Adjustable FPR?
so where do you run the wires to to make the pump come on with key
I just cut the green and white wire at the fuel pump relay and spliced it to a pink and black, all the pink and black wires I have found are 12 volt keyed.
We have a 400 small block 202 heads comp cam 3 speed Muncie transmission she gets with it
nice video thanks for the help
I have a 91 454 big block the same pretty much applys if I want to get rid of the tbi
i did this in my 88 and my speedometer isnt working now....
You can also get a tps for elderbrock from US shift
Chris Bayne I bought it and hooked it up but it still won’t shift any ideas?
im assuming the blue wire only goes to the tach for a switched 12v source?
Blue wire is tach signal to computer to tell it the engine is running to turn on the fuel pump.
Hey I got a question. I'm doing the swap on my 90 sierra using a 95 suburban 5.7. What wire did you use to supply your distributor with power. I'm thinking probably the red wire that went to the coil. Also when I turn my key on my fuel pump kicks on. Do I need that blue wire still hooked up to the tach spot on the distributor to keep the fuel pump running or would I have to worry about it since my fuel pump is already coming on. I have everything hooked up but it'll start up but then it dies even with me giving it gas with the throttle on carb. It's kinda sounding like it's running out of gas. I'm just curious if it needs the wire hooked up so the fuel pump knows to stay on.
After it dies, can you still hear the pump running? If not then I think you are on the right track. I am doing an 87 tbi to carb conversion and I was thinking this to myself.
Nice truck
What intake is this ?
Min 1:54 tanks for clear that tps 👍💯💥
#diablocustomschoker ✌️🙏
It's a purple wire on my 1989 c1500.
I need a part # on the fuel pump regulator
im a noob to all this .. does it helps with HP/Torque ??
Did every and the only problem I am having is the torque converter won't lock up. I checked my voltage at the tps, .5 volts at idle and about 4.5 at WOT. What all does the computer need to see and or have to send the signal to lock up?
if you have a 700r4 tranny you dont need a tps the 700 r4 does not use a computer to shift the tv cable controls the shift points
Not sure if you figured it out yet but I had the same problem I had to run the purple and white wire from old distributor to tec side of hei that wire runs to the trans
So did u hook up the purple and white wire and did it work in the middle of it now
@@trudymarsolek7939 did that work for you
What year did they go from carb to tip, will the carb wiring fit the later models? And does any part of the computer have to be retained? Will the factory gage's still work? And speedometer? My truck is a 1988, c,20 , 4 wheel drive automatic, 4 wheel shifter in the floor. Thanks.
Tbi started in 88 you won't need the computer all your gauges will work you'll need a different intake a fuel regulated and a HEI distributor with the right gear to match your Cam
They went to TBI in 87 with the trucks. The only signals I am sending to the factory computer are coolant temp, throttle position, and tach signal. Those and the factory speed sensor let the computer run the torque converter lockup and cruise control.
The tach signal is to tell the computer that the engine is running to turn the fuel pump on.
Is that with 4L60 transmission?
I recently changed tbi to carb . Only problem I have now is after deadheading the wires other than the tps is the A/C compressor and A/C dash light are not getting power . Were 1 of the wires I cut a source for power to the compressor or pressure switches ?
Possibly. I left all the ac wires in place. Just the compressor plug and pressure switch at the reciever/drier.
@@bassplayaz06 I only cut wires that lead to TBI unit , coolant temp sensor left unplugged that was by thermostat and wired distributor as you did . I take it none of the wires going to TBI have anything to do with the Air conditioning ?
How did you run power to the distributor?
Did you ever figure that out I'm about to be doing this to
Get it from the pink wire from the old dist. That was connected to the coil pack. I't will be pink is power and white is the tach.
650 summit works for me.
hey andrew i just did the same thing as u did were u able to get ur 4l60e to kick down? mine shifts greats be sides when i go to pass
yeah, mine is controlled by the TV cable connected to the throttle. if you have a 93-95 then it's all electronically controlled by the throttle position sensor.
If you use that tps set up does it keep old shift points? Mine shifts with tbi at 4500 will it still shift at 4500 or allow for higher?
on 700r4's the shift point is controlled by the governor on the driver side of the case. The TPS will control at what throttle input the torque converter will lock at. You can change shift points by changing the weights and springs on the governor.
bassplayaz06 i got a 4l60👎 its a good tranny if ya like electronic shit but id prefer a th400
What about on a 4l80e?
do you have the model number of the carburetor?
Noah Melton 1
I need help getting my 4l80e to shift after doing the carb sawp on my 95 chevy. What do i do to get it to shift?
Did you figure it out
Wat carb base bracket or carb to tbi intake adapter did u use. I have edelbrock #3704 intake and need an adapter to convert it carb
When I first did the swap I got a Holley street dominator carb intake that fit tbi heads. Here I have vortec heads with a Edelbrock performer carb intake
@@bassplayaz06 what part # on the holly intake?
@@1eliaskno all regular small block intakes with fit Tbi heads that very used until 95. Have your pick of any intake manifold that is good for cubic inches, rpm range, and will mount the carb you wish to use. Engines that have heads that were designed for multi port injection (mpi) also called vortec heads will require a vortec to carb intake manifold. Like this one www.summitracing.com/parts/sum-226018
U use the ecu or no
Thanks
but you dont need the tps if you have a 700r4
That was 88-92 correct
What edelbrock intake is that part # plz
is the check engine light from the conversion? also are you to run the stock intake or do you need a aftermarket intake?
Quinton Starman yeah, it's because I cut out all the unused stuff. you have to use an aftermarket one made for the tbi heads.
is there anyway to do this without setting off the check engine light?
their is a way to turn off the check engine light, did this a while ago for a friends and experiment. forgot what fuse to un plug but that is literally all you gotta do that involves the map and somthing else. pretty much making your tbi wiring harness to a carburetor set up look it up in your owner manual you will find this. hope this helps?????
A little late, I pulled the ecu/ignition fuse because when I did the swap my check engine light went off therefore blew the fuse and after I replaced the fuse my truck started running rich and sounded like it had a vacuum leak. I took the fuse out and was good as new. No more problems. I don’t have an HEI distributor at the moment, still have the one with the coil on a bracket. I just put the carb in and got the fuel pressure regulator and turned the key.
Will this setup work on a 1990 s10 4.3 planing in putting a 350 using the 4.3 transmission since there the same transmission bolts right on the 350
Same deal.
That cam sounds so mean!
Thank u for the video now my only question i i know u did a carb swap but im taken 4.3 its a 5speed but taken 4.3 out slapen my 355 in its place will it still work as far as like the wiring goes im pretty sure it will work but what would ure opinion be i know trans will work as well and the truck is a 91 short bed single cab
Mr. Clyde Im got the same project ongoing as well in the same model truck. Hows your project coming along and have you ran into any complications so far. Im removing the 4.3 in mine now and will be putting in a built sbc. What clutch kit did you purchase for the trans? Thanks in adavnce
Wes Lyons well thb the clutch flywheel and pressure plate will work on the 350 n bolt right up but ima go a different route with min n just do a four speed for now
Clyde Ashley. Eventually ill do the same. But for now i will use what i got. But right on appreciate the feedback
how did you hook up the fuel lines mine are braided I see yours are rubber
Braided hoses are just rubber hoses with a braided cover
sorry Richad but no i still got the 327 block
Was u able to keep stock throttle cable the same length or did it need modified
Stock cable. I used the stud from the TBI on the carb linkage.
With using the correct Holley throttle bracket for 700r4 tv cable.
@@bassplayaz06 ok thanks
why do you need a throttle position sensor on a 700r4 transmission? (which I believe is what you have?)
No, the 700r4 is not an electronically controlled transmission, the 4l60e is how ever.
@@megafan0258 than why do he need a tps if its a 700r4
What size or whats it called (intake)
how much did you spend on the carb and everything to convert?
My first set up all i had bought was an intake, carb, pressure regulator, and TPS kit. Holley 600 carb was $320, intake was $180, TPS kit (part # 534-202) was $122, regulator was $50.
bassplayaz06 Alright, thank you
Andrew, I put a 400 small block in my 1993 C 1500 with a carburetor. It has the 4L60E transmission. I bought the TPS kit from Holley and put it on the 600 cfm Holley. I have got the 5+ amps going to the TPS but I still can't get the transmission to shift correctly. I am not sure that the transmission was working properly to start with. What route would you suggest that I take next? I would really love to keep an overdrive transmission if at all possible. The 400 engine, actually a 406, acts like it is way down on power, maybe like the transmission has it in a bind. I know that it is not starting in low gear but I don't know what gear it is starting in. It only shifts one time.
@@jamesedwards3729 not 100% sure but its possible its the detent cable not allowing it to shift,often times it gets confused with a kick down cable but it is connected to a valve in the trans .has the same purpose as the vacuum valve on the 350t and the 400t ,minus the vacuum
. just a thought.
@@jamesedwards3729 mine too its confusing have you found a solution i talked to holley and they said we need 2 more peices that cost 1000 to complete the setup
Do u have a link for this carb
hey bro did you use the stock tbi electric fuel pump ?
Roubraunstein90 ,uh yeah he did. he explained it in the beginning.
Question for ya’ll. I installed an LS 5.3 with a carb swap on my 92 K1500. I am wondering what throttle cable to use? Any info would be helpful
You should be able to run your stick cable or a lokar cable
or go with a stout sbc. simple. no complications. or go the ls route everyone else is doing
Do you have to run the tps if you have a non electronic trans like the 700r4 or th400/350?
MyLonewolf25 no
no you dont the tv cable controls shift points
Didn’t need a TPS on my swap.
Robert Self, I'm thinking about doing this myself. I have a 350 tbi with 4l80. What did you do for the TPS?
I just completed the same swap and my stock tach isn't working. Any wiring ideas?? Also, did you have to run octane boost? I now have a dieseling problem.
Check your ignition timing, or you could even have carbon on the pistons or heads causing that issue, or double check your fuel psi so that it's not too much
On my 602 creat 355 550 hores.
tach wire goes to ECU reference for 4l60e control?
No, it's used to tell the computer to turn the fuel pump on.
problem j dont have a blue wire on 89 s10 any idea which wire it is on they pinout
tim any 12 volt switched hot will fo
do
How did you bypass the map sensor or all of them i know said you cut them out but how did you keep ecm and still get it to run
Dont really need map on these just delete it
Lol I have an edelbrock avs2 on my 95😂
I have to buy a transmission control unit for mine because I didn’t know about the tps at the time woohoo.
I put the tps kit on it and holley is saying I need this