Some notes for those of you about to tackle this rebuild; It's super easy, and 3rd Gen Guy goes into incredible detail with this, but having just done this yesterday I have some tips/advice to add with issues I ran into. Also thank you so much 3rd Gen Guy, without your video I would have had to have a mechanic do this. Thanks a ton. 1) LUBRICATE THE O-RINGS! I did not do this, and I blew out the O-rings! The injectors started dumping fuel out into the throttle body, and my car sounded like a truck! Struggled to start, stay on, it was super ugly. Had to let the car spend the night in an O Reilly parking lot and didn't find the issue until the next day. The Haynes manual says to use transmission fluid, but motor oil (what I used), vaseline, and dish soap all work good too. 2) Removal of the injectors. My injectors did not simply pull out, no matter what I used. I used vise grips ontop of where the screws go, holding down the injector pod cover, with some cardboard to protect the smooth gasket face, and using the head of the vice grips as a leverage point, used a screwdriver underneath the center "mushroom" between the two poles of the injector to pry it up out of its seating. Much easier than scarring the injector by clamping down too hard in my case. 3) If you dont have an electrolysis kit, some carb/choke cleaner will run you 6 bucks for 2 bottles and you can pick up a pack of little wire brushes (plastic, brass & steel) at an auto store. Combined with some Q-tips and maybe a little PB Blaster (make sure you wash everything out afterwards with carb cleaner if you use this) and you can polish that aluminum right up. 4) Make sure to take pictures of everything as you're disassembling it step by step Hope this helps anyone trying to head this on. Thanks again for the video.
Thanks for the info. Putting the parts into a cardboard map is a great idea + the pictures . I would also check all metal surfaces for warpage with a metal straight edge . I also check the throttle shaft for excessive play in the bushings . Use flare nut / tubing wrenches and 6 point sockets where possible . Great video . Bill .
Hey! Thanks for the tips! I have a question though... I have a couple o rings left over in my kit. A green one and I think a couple larger black ones, ( but still smaller than the O-rings that go in the injectors)and the foam ring. I also have to larger figure eight o rings that I believe go to the Rochester 300 along with the other plate gasket. I guess my question is... Is this normal to have these leftover on the 220 Rochester rebuild?
@@bonscotty67 Im not certain :( my 3rd gen got totaled last year by a drunk driver so I haven't worked on one in a bit. I would look up some schematics for the Throttle body or the parts list of the kit you bought to see if it describes what they are.
Thanks for replying. Yeah it's just one small green o ring and a little larger black one, the foam ring. And the figure eight that I know goes to the 300. Anyway I'll have to taking apart again and see if I collapsed the fuel regulator gasket. Pressing it down with that spring was kind of a hassle and probably f'd it up. I've replaced about everything on this truck and it still runs like crap. Oh well. Thanks again. Wish me luck :-)
Thank You 3rd Gen Guy. This video was very helpful. I rebuilt my TBI today. You made it look easy! I had trouble with one of the injectors leaking from the top, and google told me it was an o-ring problem. The orings that came with the rebuild kit were slightly too large and kept coming out as I tightened down the plate on the injectors. I solved this by putting the rubber oring in first followed by the steel oring. No leaks now. Also... after completing this, the injectors seemed super loud inside the cab of my truck, the rapid ticking sound was really loud, I thought I broke something. Consulted google again, turns out it was just one of the steel fuel lines was making contact with my cab, the noise is normal but not supposed to be transmitted into the cab. I pulled the steel fuel line away from the cab and buffered it with plastic corrugated covering stuff. No more noise! Finished. I didn't tune it yet, but I will do that maybe next week. Thank you for showing us how to do that as well, you're awesome.
The Quality & Clarity on this video is unlike any out there... No Rambling, Stupidity, or Carrying On instead of Clearcut Instructions..! It was exactly what I needed to fix my TBI... Thank you so much Sir...🙏
I'm a working Tech professional, great job on this video! Although I do this for a living and have done this procedure many times, I enjoyed the detail without the B.S..
This video was a HUGE help to me. I did the TB on my 92 RS yesterday, and because of the video the hardest part was getting some of the old gaskets off. As someone else said, definitely a good idea to lubricate the o rings!
The perfect DIY video. Everyone who posts videos such as these, should take lessons from you. My 93 Chevy 1500 is back on the road thanks to you .....Thank you very much.
tt was a pleasure to watch this video as I did a rebuild on the tbi of my 87 s10 blazer last year. The one thing that I did differently was to fabricate a fitting that I could pump carb cleaner thru the injectors while using the 9v battery technique. I was concerned about clogged injectors so I wanted to insure that the spray pattern was excellent. I had to do other things at the same time, o2 sensor, throttle position senson and just recently the idle control valve. The enjine has great power for a 2.8 and is very responsive on acceleration. I wish I had seen your video when I was going to attempt the job. It was a good review for me.
Great step by step video. Mine was with an upgraded lower half and a new spring for greater fuel pressure. Only thing I would change would be pulling the injectors with pliers. This is a bad idea and actually much harder than levering them out. The key is to break the hold on the bottom ring. Pulling straight up is more difficult. Loved it.
While you have it apart, take a little extra time to blend and polish the throats and add a spacer to the injector tower. The airflow can be improved by a fair amount, along with throttle response and fuel atomization by doing so. An adjustable fuel pressure regulator doesn't hurt either, makes them much more tuneable. Doesn't hurt to pop the cover off the idle screw for further tuning if you're getting a little aggressive with your timing. Nicely done Sir! This vid is a perfect example of no-nonsense, get it done, it's easier than it looks kind of wrenching.
after watching your video, I am planning to rebuild my TBI unit. I have the TBI cleaned and spread out on my table, and have a rebuild kit . I want to watch this video a few more times, then get busy on the rebuild.
As I sit here now, I'm gonna admit that I NEVER knew about the reset. Never!! Great vid, very informative, and straight to the point. Thx for sharing /posting. Gonna attack my Yukon when I get the rebuild kit next week. And I'm also a 3rd Gen lover/owner😁😏👍🏿👌🏿. 85 Z
Perfect, Just what I needed. I will watch it a few more times before I tackle the rebuild. And plan to have a laptop handy during the work so I can watch parts of it again.
Excellent video. My 1989 Chevy Cheyenne one ton SB 350 TBI is getting rebuilt soon by me with the help of this video. Thanks for sharing this step by step rebuild. You took the guess work out of the job.
Great tutorial. I've rebuilt a TBI once before. This was a good refresher for me. One thing I did not learn until now is the idle re-program which you show here. If it is the same step for the truck v6 as with the engine you have in the Camero, shown here, then that would be the only thing left for me to do for my pick up truck. Thanks, again.
my dad told me these were simple to work on. i didnt realize just HOW simple they were. great video. i have a buick 350 i wanna adapt a tbi onto. might just do that sooner than later. =)
Just did this procedure and the video was a big help. Suggestion: while installing the fuel pressure regulator gasket, I cut 4 pieces of aluminum wire approx .100 thick and 6"long to make posts to keep the spring, cover and gasket straight as I collapsed it. Insert the wire post through spring cap and bottom assembly. The posts kept the housing centered and the gasket in correct position. Remove post one at a time and tighten screws. Great video, thanks for posting!
Great video, I'm rebuilding my TB on my 91 Firebird right now, 2 things I noticed, you forgot to reinstall the dust seal gasket on the fuel pressure regulator, and to avoid gas leaking out your gas lines, pull the fuse for the fuel pump and crank it over until no fuel is coming out of the injectors. Thanks for the help!! All your videos are very helpful!!
Watch dozens of BRO throttle body rebuilds and this was definitely my favorite video So far. Great work. Please post more builds and repairs.. anything just gives us facts and less about what you had for dinner lol
many ""car you tubers" drive me insane. its always a "HEY GUYS 69-69X here gonna install an eBay coil over kit" they then show no steps and turn it into a Vlog.
Great detail, 3rd Gen Guy, with good narration! There are VERY FEW quality videos available on rebuilding these older throttle body units. Thanks for your help and for the helpful tips, also.
Duke, The only parts I have left from Chicago Carburettor kit 1991 Astro van 4.3 liter are two little mystery ‘ out 1/8 in livameter plastic with a little clear at bottom letting a little sunlight shine. A hearty hurrah from Geneva, Ohio close to Lake where van can hopefully lunch a 1960’s Day Sailor without becoming fish food or laughing stock of ‘hilarious boat launch’. I work better from direct instruction; Mom looking down (she bought this Van in 1991) thanks 3rd Gen Guy and wonderful designer (s).
Thanks! Great! Had serious problem with a 89 350 tbi that I installed in a 56 chevy pickup. Did not respond and very hard to start. Followed Your instruction, never worked with a fuel injected trottle body before. Got a fuel leak from the fuel pressure regulator, did it right, was a bit more careful with the spring, not a big deal. Magic, it runs so well, and so responsive and starts in a fraction of a second. / Bo Johansson, Sweden.
Ok did the job today and their were a couple of problems but I got'er done and my truck runs super now. 454SS so there were a few thigs different. The Pressure regulator is a bitch to hold it together and screw it together, gasket gets all wonkey and produced a leak the fist time. Re did it and alls good Thanks for the video
Since replacing the IAC it been idling high, the last part is good to know, of course it wasnt done..but I'll get it tomorrow...great info...'94 Chevrolet Cheyenne 4.3l
One thing to note, when installing the spring it is easier to use two straight picks inserted into two empty screw holes to help hold in place. Much easier than pushing down the spring just by hands.
Your Fuel line is dripping because fuel tank has pressure in it from temperature change. Crack the gas cap to alleviate pressure. Excellent video, had no idea there way an idle air control valve learn procedure.
Jeremy, Because automobiles are ubiquitous, I tended to take Mom’s Chevy ‘91 van as a boat building carrier to Florida. I ride bicycle after measuring Cutty Sark to build Caledonia, built across river Leven, Scotland in 1850. Umpteen journeys to Cedar Key, Fl. are promising. Oak keels, steel bending hand tools, lots of wood, and following Lloyd’s Rules of 1868. Chevrolet is driven no more than 44 mi/hr to conserve fuel and park for months at a time. It’s half length of Denny’s Caledonia which hauled coal from Stockton to London. I really listened to 3rd Gen Guy’s inflections of words he speaks.
I'm going to subscribe, I just got a 3rd gen Firebird and your tutorials will help with rebuilding the car. Thank you for going in to detail on this tutorial and many others on your channel it will help me significantly.
Hands down the best rebuild video. I was going to make a video and post myself but after watching this one I've decided to make my money else wear. Great job!!
Goes very helpful with the idle air control because I’ve been having problems with mine and I didn’t know it had to be adjusted that way, thank you for the video it was very helpful
Hey bud your awesome. Thanks for a very detailed video. And thanks for not bragging for 30 min about what you have and not playing stupid unnecessary music. Your video was perfect. Do you by chance have or know the price and the rebuild kit #?? Any help would be greatly appreciated. Thanks again
Greatly appreciate your video it gave me the confidence to rebuild mine instead of speeding undo money on a new one. Please post more if you can and thanks again. 3rd gen new old owner again.
Great video . What a help this is. Thankyou so much. Does every tbi system need to be re booted so to speak like you did here with the "a&b" wire jump?
great video for a basic rebuild when your putting it back together use some atf on all the o-rings also o-rings on the fuel lines there are a bunch of mods that you can do like order a big block kit use the spacer under the injector to raise it up (more air flow )also the regulator is also adjustable when its apart the disc inside move it up for more and down for less make the notch larger in the cover remove the tab that holds it static cut small notch,s around the disc so a small tool can be used to adjust up or down this things like about 15 psi butt will run on about 9 psi if your a mileage guy keep it down to about 10 or 12 an HP guy crank it up to 15 or more they also love boost I had a 383 alum head with a pro-charger and past Calif emissions
Hey great video. I've used it to rebuild my tbi. I have a 91 buick roadmaster with the 305 tbi. I replaced the iac and now my car is running super rough and rich at idle. Will doing the reset as per your video will work?
Great video. Just curious why you didn't change the two small filters in the side of the injectors. All of the tbi's ive rebuilt have been fully clogged. Either way it's a very good tutorial.
A few things I might suggest for a perfect rebuilt: 1. Lube up o-rings / gaskets before mounting. 2. Do not overtighten the screws, preserve the same torque as it was originally. 3. If you can, organize your screws and reuse the same ones (on the micro level, each thread and tap will have adapted one to another over the years) 4. Preserve tolerances : mating surfaces should not be cleaned with hard abrasives... prefer using lower energy setting over longer time in the ultrasonic cleaner. 5. if using carb cleaner, do not wash plastic based parts with it; prefer isopropyl > 70%, degreaser + ultrasonic (never acetone) 6. do not completely submerge the injectors in the solvent/degreaser and ultrasonic cleaner. 7. Run low amperage, 3-4 volt, pulsed pwm to open and close the solenoid in the injectors, connect it to a 10-20 psi source of solvent or gasoline or kerosene, and pump it through while in the ultrasonic cleaner, this will clean properly the inside of the injector fuel path down to microscopic level... 8. About chinese ultrasonic cleaners... Bigger is not necessarily better... You would need to fine tune it to find the best resonant frequency to the object you are cleaning, they are said to be tuned at an average 40Khz, but there are multiple resonant modes within that stainless bath tub.. I am adding 25khz as well and low frequencies as well with a low freq loud speaker.. read about it. 9. I use seafoam or injector cleaner like STP. 10. what the TBI looks like from the outside isn't that important vs. the fuel paths, vacuum/air paths aren't as important.. Fuel path restriction, build-up, will be the dominant problem here. 11. Take your time to remove the remainder of old gaskets, do not use hard abrasives, use time, temperature, solvent that doesn't react with metal. Razor blade as last option, be patient instead... You want ideally to preserve the surface tolerances; however they might already have been deformed by the age and temperature differentials; so I'm not totally sure about this, but hey, don't want to make it worse. 12... and so on.
Wow! One of the best instructional car repair videos on UA-cam! Many thanks. However, at ~12.01 you show disconnecting the Inlet Air Control Valve but it looks like the Throttle Position Sensor is also disconnected. Am I not seeing this correctly? Is it important? Thanks again.
You needed to de-pressurize the fuel system before disconnecting the fuel lines. Disconnect the fuel pump and turn engine over; de-pressurized fuel system. FYI
one question, the black 'Y' gasket you removed that fell apart, on mine was a thicker piece and made of what appeared to be a "spacer" type material, plus it did not come in the rebuild kit so Im glad it was in good shape after cleaning it. Also when reinstalling the regulator gasket I found it very difficult to keep it centered over the fuel inlet all while holding together and trying to get the screws started, had it go cockeyed and caused a fuel leak upon starting. Had to redo it with the help of a friend. Other than that it runs so much better now, glad i did it
so a common MOD is to install a taller Y-Gasket to allow more air to flow past the injectors. you probably had one of those spacers already. and ya, the fuel pressure regulator is a BIT** to get on.
Holy shit dude. Looks great! Nice work!! one of the best third gen videos i've seen! Also, NOONE DOES TBI VIDEOS! So thank you so much!! Everyone is into their TPI's, TBI is where its at! (not really, but TBI's are cool too!) THAKNS AGAIN !!
What can I say? Everybody agrees that this is absolutely a top-notch how to video. Thanks 3rd Gen Guy!
Absolutely
Great to see extra info on TBI Gasket (9:34) & Idle Air Control reset ( 11:30).. no one else has mentioned that! Invaluable...
Some notes for those of you about to tackle this rebuild; It's super easy, and 3rd Gen Guy goes into incredible detail with this, but having just done this yesterday I have some tips/advice to add with issues I ran into. Also thank you so much 3rd Gen Guy, without your video I would have had to have a mechanic do this. Thanks a ton.
1) LUBRICATE THE O-RINGS! I did not do this, and I blew out the O-rings! The injectors started dumping fuel out into the throttle body, and my car sounded like a truck! Struggled to start, stay on, it was super ugly. Had to let the car spend the night in an O Reilly parking lot and didn't find the issue until the next day. The Haynes manual says to use transmission fluid, but motor oil (what I used), vaseline, and dish soap all work good too.
2) Removal of the injectors. My injectors did not simply pull out, no matter what I used. I used vise grips ontop of where the screws go, holding down the injector pod cover, with some cardboard to protect the smooth gasket face, and using the head of the vice grips as a leverage point, used a screwdriver underneath the center "mushroom" between the two poles of the injector to pry it up out of its seating. Much easier than scarring the injector by clamping down too hard in my case.
3) If you dont have an electrolysis kit, some carb/choke cleaner will run you 6 bucks for 2 bottles and you can pick up a pack of little wire brushes (plastic, brass & steel) at an auto store. Combined with some Q-tips and maybe a little PB Blaster (make sure you wash everything out afterwards with carb cleaner if you use this) and you can polish that aluminum right up.
4) Make sure to take pictures of everything as you're disassembling it step by step
Hope this helps anyone trying to head this on. Thanks again for the video.
Thanks for the info. Putting the parts into a cardboard map is a great idea + the pictures . I would also check all metal surfaces for warpage with a metal straight edge . I also check the throttle shaft for excessive play in the bushings . Use flare nut / tubing wrenches and 6 point sockets where possible . Great video . Bill .
Hey! Thanks for the tips! I have a question though... I have a couple o rings left over in my kit. A green one and I think a couple larger black ones, ( but still smaller than the O-rings that go in the injectors)and the foam ring. I also have to larger figure eight o rings that I believe go to the Rochester 300 along with the other plate gasket. I guess my question is... Is this normal to have these leftover on the 220 Rochester rebuild?
@@bonscotty67 Im not certain :( my 3rd gen got totaled last year by a drunk driver so I haven't worked on one in a bit. I would look up some schematics for the Throttle body or the parts list of the kit you bought to see if it describes what they are.
Thanks for replying. Yeah it's just one small green o ring and a little larger black one, the foam ring.
And the figure eight that I know goes to the 300. Anyway I'll have to taking apart again and see if I collapsed the fuel regulator gasket. Pressing it down with that spring was kind of a hassle and probably f'd it up. I've replaced about everything on this truck and it still runs like crap. Oh well. Thanks again. Wish me luck :-)
How do you lubricate the o rings?
The finest how to video I've seen. Not a lot of babble just plain and simple instructions.
As good a any commercial production.
Thankyou. Made it so easy.. great video. And greatly appreciated you taking time to help
Right!!
One of the top 10 youtube videos on car repair I've ever seen.
Thank You 3rd Gen Guy. This video was very helpful. I rebuilt my TBI today. You made it look easy! I had trouble with one of the injectors leaking from the top, and google told me it was an o-ring problem. The orings that came with the rebuild kit were slightly too large and kept coming out as I tightened down the plate on the injectors. I solved this by putting the rubber oring in first followed by the steel oring. No leaks now. Also... after completing this, the injectors seemed super loud inside the cab of my truck, the rapid ticking sound was really loud, I thought I broke something. Consulted google again, turns out it was just one of the steel fuel lines was making contact with my cab, the noise is normal but not supposed to be transmitted into the cab. I pulled the steel fuel line away from the cab and buffered it with plastic corrugated covering stuff. No more noise! Finished. I didn't tune it yet, but I will do that maybe next week. Thank you for showing us how to do that as well, you're awesome.
The Quality & Clarity on this video is unlike any out there...
No Rambling, Stupidity, or
Carrying On instead of Clearcut Instructions..!
It was exactly what I needed to fix my TBI...
Thank you so much Sir...🙏
Glad I could help.
car You-tubers tend to forget: they should SHOW people how to do something, not talk about how they did it.
@@3rdGenGuy
Thank you once again...🙏
I'm a working Tech professional, great job on this video! Although I do this for a living and have done this procedure many times, I enjoyed the detail without the B.S..
Best TBI rebuild vid on the tube. Thanks dude!!
Seriously!
This video was a HUGE help to me. I did the TB on my 92 RS yesterday, and because of the video the hardest part was getting some of the old gaskets off. As someone else said, definitely a good idea to lubricate the o rings!
The perfect DIY video. Everyone who posts videos such as these, should take lessons from you. My 93 Chevy 1500 is back on the road thanks to you .....Thank you very much.
tt was a pleasure to watch this video as I did a rebuild on the tbi of my 87 s10 blazer last year. The one thing that I did differently was to fabricate a fitting that I could pump carb cleaner thru the injectors while using the 9v battery technique. I was concerned about clogged injectors so I wanted to insure that the spray pattern was excellent. I had to do other things at the same time, o2 sensor, throttle position senson and just recently the idle control valve. The enjine has great power for a 2.8 and is very responsive on acceleration. I wish I had seen your video when I was going to attempt the job. It was a good review for me.
Great step by step video. Mine was with an upgraded lower half and a new spring for greater fuel pressure. Only thing I would change would be pulling the injectors with pliers. This is a bad idea and actually much harder than levering them out. The key is to break the hold on the bottom ring. Pulling straight up is more difficult. Loved it.
They can be pushed up from the bottom.
This is gonna help a lot bc my step dad gave me a 1992 camaro rs like this before he died and it is in bad shape thx for helping me with the tbi
While you have it apart, take a little extra time to blend and polish the throats and add a spacer to the injector tower. The airflow can be improved by a fair amount, along with throttle response and fuel atomization by doing so. An adjustable fuel pressure regulator doesn't hurt either, makes them much more tuneable. Doesn't hurt to pop the cover off the idle screw for further tuning if you're getting a little aggressive with your timing. Nicely done Sir! This vid is a perfect example of no-nonsense, get it done, it's easier than it looks kind of wrenching.
yes polishing the throats make a big difference along with a small timing advance on a tired engine.
ordered my kit and new injectors, after watching your video i have the confidence to do this, thank you
I have a 4.3 chevy tbi on my Franken Jeep with the amc 258 and this video was an asset to my rebuilding the tbi unit.Thanks!
Thank you for this video. Finally was able to get to rebuilding the TBI on my 95 chevy c1500 v6. Everything went perfectly!
after watching your video, I am planning to rebuild my TBI unit. I have the TBI cleaned and spread out on my table, and have a rebuild kit . I want to watch this video a few more times, then get busy on the rebuild.
As I sit here now, I'm gonna admit that I NEVER knew about the reset. Never!! Great vid, very informative, and straight to the point. Thx for sharing /posting. Gonna attack my Yukon when I get the rebuild kit next week. And I'm also a 3rd Gen lover/owner😁😏👍🏿👌🏿. 85 Z
Exceptional work on this video. I appreciate the step by step simplicity of the instructions without all the extra dialogue.
This will be the first engine I rebuild starting with that TBI. So happy to have come across these videos of yours. Wish me luck. LOL
Perfect, Just what I needed. I will watch it a few more times before I tackle the rebuild.
And plan to have a laptop handy during the work so I can watch parts of it again.
Great video, shows and explains along the way from the beginning to the end. I'm going try this project myself..thank you
owner of a 92 chevy tbi, -great video!!!
Excellent video.
My 1989 Chevy Cheyenne one ton SB 350 TBI is getting rebuilt soon by me with the help of this video.
Thanks for sharing this step by step rebuild. You took the guess work out of the job.
Great tutorial. I've rebuilt a TBI once before. This was a good refresher for me. One thing I did not learn until now is the idle re-program which you show here. If it is the same step for the truck v6 as with the engine you have in the Camero, shown here, then that would be the only thing left for me to do for my pick up truck. Thanks, again.
my dad told me these were simple to work on. i didnt realize just HOW simple they were. great video. i have a buick 350 i wanna adapt a tbi onto. might just do that sooner than later. =)
Any tips on putting a tbi 350 into a g body? 86 Cutlass.
@@adamwhitt9349 Buy a Chevy and gut the Cutlass.
Just did this procedure and the video was a big help. Suggestion: while installing the fuel pressure regulator gasket, I cut 4 pieces of aluminum wire approx .100 thick and 6"long to make posts to keep the spring, cover and gasket straight as I collapsed it. Insert the wire post through spring cap and bottom assembly. The posts kept the housing centered and the gasket in correct position. Remove post one at a time and tighten screws. Great video, thanks for posting!
Best TBI rebuild video I've seen. Well Done.
Great video, I'm rebuilding my TB on my 91 Firebird right now, 2 things I noticed, you forgot to reinstall the dust seal gasket on the fuel pressure regulator, and to avoid gas leaking out your gas lines, pull the fuse for the fuel pump and crank it over until no fuel is coming out of the injectors. Thanks for the help!! All your videos are very helpful!!
often time i miss filming a small step here and there.
@@3rdGenGuy again thank you so much for the help. Without your video I wouldn't have been able to rebuild it correctly. Got it running today
Watch dozens of BRO throttle body rebuilds and this was definitely my favorite video So far. Great work. Please post more builds and repairs.. anything just gives us facts and less about what you had for dinner lol
many ""car you tubers" drive me insane.
its always a "HEY GUYS 69-69X here gonna install an eBay coil over kit"
they then show no steps and turn it into a Vlog.
Great detail, 3rd Gen Guy, with good narration! There are VERY FEW quality videos available on rebuilding these older throttle body units. Thanks for your help and for the helpful tips, also.
Duke, The only parts I have left from Chicago Carburettor kit 1991 Astro van 4.3 liter are two little mystery ‘ out 1/8 in livameter plastic with a little clear at bottom
letting a little sunlight shine. A hearty hurrah from Geneva, Ohio close to Lake where van can hopefully lunch a 1960’s Day Sailor without becoming fish food
or laughing stock of ‘hilarious boat launch’. I work better from direct instruction; Mom looking down (she bought this Van in 1991) thanks 3rd Gen Guy and wonderful designer (s).
Thanks! Great! Had serious problem with a 89 350 tbi that I installed in a 56 chevy pickup. Did not respond and very hard to start. Followed Your instruction, never worked with a fuel injected trottle body before. Got a fuel leak from the fuel pressure regulator, did it right, was a bit more careful with the spring, not a big deal. Magic, it runs so well, and so responsive and starts in a fraction of a second. / Bo Johansson, Sweden.
Well done very clear and concise i followed this on my 1994 Astro 4.3, and it runs much smoother now.
Ok did the job today and their were a couple of problems but I got'er done and my truck runs super now. 454SS so there were a few thigs different. The Pressure regulator is a bitch to hold it together and screw it together, gasket gets all wonkey and produced a leak the fist time. Re did it and alls good
Thanks for the video
FANTASTIC! Thank you ❤ IAC reset was invaluable 👍
Since replacing the IAC it been idling high, the last part is good to know, of course it wasnt done..but I'll get it tomorrow...great info...'94 Chevrolet Cheyenne 4.3l
One thing to note, when installing the spring it is easier to use two straight picks inserted into two empty screw holes to help hold in place. Much easier than pushing down the spring just by hands.
I wish I would have read this before I installed the spring.....I was yelling f--- in languages I don't even know!
Your Fuel line is dripping because fuel tank has pressure in it from temperature change. Crack the gas cap to alleviate pressure. Excellent video, had no idea there way an idle air control valve learn procedure.
Wow. You make it look easy. Thank you. Hopefully I can rebuild my '95 Chevy truck.
You can I’m 21 and can do it I know you can
Woah . Had like 8 of this style trucks and just learned their are gasket for the air intake and that can wow
Learn something new everyday
Jeremy, Because automobiles are ubiquitous, I tended to take Mom’s Chevy ‘91 van as a boat building carrier to Florida. I ride bicycle after measuring Cutty Sark
to build Caledonia, built across river Leven, Scotland in 1850. Umpteen journeys
to Cedar Key, Fl. are promising. Oak keels, steel bending hand tools, lots of wood, and following Lloyd’s Rules of 1868. Chevrolet is driven no more than 44 mi/hr to conserve fuel and park for months at a time. It’s half length of Denny’s Caledonia which hauled coal from Stockton to London.
I really listened to 3rd Gen Guy’s inflections of words he speaks.
Very well presented. Thank you. Check throttle shaft for slop. Too much up and down play and you have a vacuum leak.
I'm going to subscribe, I just got a 3rd gen Firebird and your tutorials will help with rebuilding the car. Thank you for going in to detail on this tutorial and many others on your channel it will help me significantly.
Got a 94 c1500 going to do it myself now excellent video
That looks fun. I can't wait to do that to my Camaro .
Make sure you clean the PCV passage, mine was totally plugged on the one I did recently! Good job on the video!
Hands down the best rebuild video. I was going to make a video and post myself but after watching
this one I've decided to make my money else wear. Great job!!
glad you liked it.
but trust me, these videos make a small amount of money. like very little
Very well explained and easy to understand Thanks
very smart guy, lol.. just what i needed to know about my 95 chevy v6
Very good video, Wish I saw this before I rebuilt my TBI 1990 chevy 3500 series truck. Now I will go back and do it right.....
I don't even have a TBI (got TPI), yet this is such a great and interesting video. Great job!
One of the greatest videos so far!
Goes very helpful with the idle air control because I’ve been having problems with mine and I didn’t know it had to be adjusted that way, thank you for the video it was very helpful
Vacuum leak somewhere. Throttle shaft end/s likely. A simple TBI rebuild should not alter the factory set idle speed.
Thank you. I have a 93 c1500 giving me problems. Think a entire TBI rebuild is what it needs.
Hey bud your awesome. Thanks for a very detailed video. And thanks for not bragging for 30 min about what you have and not playing stupid unnecessary music. Your video was perfect. Do you by chance have or know the price and the rebuild kit #?? Any help would be greatly appreciated.
Thanks again
kit was like $30 off amazon.
Yeah 30$ at plates house too
Best TBI video ever, thanks 😊
Greatly appreciate your video it gave me the confidence to rebuild mine instead of speeding undo money on a new one. Please post more if you can and thanks again. 3rd gen new old owner again.
Excellent video. Straight . No fluff. Thank you
That looks pretty simple to do thanks for some good advice
Simple and to the point. Perfect.
Great video . What a help this is. Thankyou so much. Does every tbi system need to be re booted so to speak like you did here with the "a&b" wire jump?
only if your idle is wrong.
Thank you very much! I like this video! Respects from Finland!
Thank so much, greeting from Bangkok,,,,,
Nicely done. Very thorough and complete.
great video for a basic rebuild when your putting it back together use some atf on all the o-rings also o-rings on the fuel lines there are a bunch of mods that you can do like order a big block kit use the spacer under the injector to raise it up (more air flow )also the regulator is also adjustable when its apart the disc inside move it up for more and down for less make the notch larger in the cover remove the tab that holds it static cut small notch,s around the disc so a small tool can be used to adjust up or down this things like about 15 psi butt will run on about 9 psi if your a mileage guy keep it down to about 10 or 12 an HP guy crank it up to 15 or more they also love boost I had a 383 alum head with a pro-charger and past Calif emissions
Adjusting the regulator ??? A tighter spring raises or lowers fuel pressure??
I rebuilt mine without removing throttlebody.Took about 20 minutes.Worked great
Excellent explanation of directions, filming ! Thank you much sir!
Best video I could fined ,learned a lot ,very good
Thank for this video really helped with my 94 tbi rebuild
Awesome job buddy and to the point
Perfect video just what I was looking for! Thank you
Great video and well informed on the step by step procedure, keep it up thumbs up.
Hey great video. I've used it to rebuild my tbi. I have a 91 buick roadmaster with the 305 tbi. I replaced the iac and now my car is running super rough and rich at idle. Will doing the reset as per your video will work?
Very precise. Thanks, going to do my 89 c 1500 this weekend
Great video thanks for the heads up on the reset!
Great vid, now i tear into my 1990 wrangler 4 cyl's gm tbi and see what i can put back together with my rebuild kit fingers crossed
Great video. Just curious why you didn't change the two small filters in the side of the injectors. All of the tbi's ive rebuilt have been fully clogged. Either way it's a very good tutorial.
6:25 my man!
it's all there
Only thing missing in this video was the socket and t sizes...but good video..ima take a wack at my 89 now
Watched it again...!
Great Job...👍
Excellent job
Gracias mtro, x su información,le doi un diez, saludos d ver, mex,
Take gas cap off and give it a minute and gas will not cone out of fuel lines
Very informative good job
very good , excuse me I not speak English but video is great
A few things I might suggest for a perfect rebuilt:
1. Lube up o-rings / gaskets before mounting.
2. Do not overtighten the screws, preserve the same torque as it was originally.
3. If you can, organize your screws and reuse the same ones (on the micro level, each thread and tap will have adapted one to another over the years)
4. Preserve tolerances : mating surfaces should not be cleaned with hard abrasives... prefer using lower energy setting over longer time in the ultrasonic cleaner.
5. if using carb cleaner, do not wash plastic based parts with it; prefer isopropyl > 70%, degreaser + ultrasonic (never acetone)
6. do not completely submerge the injectors in the solvent/degreaser and ultrasonic cleaner.
7. Run low amperage, 3-4 volt, pulsed pwm to open and close the solenoid in the injectors, connect it to a 10-20 psi source of solvent or gasoline or kerosene, and pump it through while in the ultrasonic cleaner, this will clean properly the inside of the injector fuel path down to microscopic level...
8. About chinese ultrasonic cleaners... Bigger is not necessarily better... You would need to fine tune it to find the best resonant frequency to the object you are cleaning, they are said to be tuned at an average 40Khz, but there are multiple resonant modes within that stainless bath tub.. I am adding 25khz as well and low frequencies as well with a low freq loud speaker.. read about it.
9. I use seafoam or injector cleaner like STP.
10. what the TBI looks like from the outside isn't that important vs. the fuel paths, vacuum/air paths aren't as important.. Fuel path restriction, build-up, will be the dominant problem here.
11. Take your time to remove the remainder of old gaskets, do not use hard abrasives, use time, temperature, solvent that doesn't react with metal. Razor blade as last option, be patient instead... You want ideally to preserve the surface tolerances; however they might already have been deformed by the age and temperature differentials; so I'm not totally sure about this, but hey, don't want to make it worse.
12... and so on.
Rubbing chapstick on the gaskets allows for easy removal later and without them sticking.
Another tip...coat paper gaskets with Chapstick. This will prevent them from sticking.
excellent video - just remember to have a rubber cap for the fuel line so the gas doesn't gush when its disconnected.
oh yaaaa
my lines leaked out 3/4 of a tank over a week lol.
ya learn i guess.
Just a heads up everybody when doing fuel lines (3/4 and 5/8) to avoid fuel leaking take the Gas Cap off to relieve pressure.
The tank is vented anyway...
Maybe so be the me vented valves are dirty.
Best video I love the step by step I’m a dummy
Wow! One of the best instructional car repair videos on UA-cam! Many thanks. However, at ~12.01 you show disconnecting the Inlet Air Control Valve but it looks like the Throttle Position Sensor is also disconnected. Am I not seeing this correctly? Is it important? Thanks again.
the TPS is separate, doesn't matter if it's plugged in not not when resetting the IAC.
Great video, I’m going to be trying this on my k5 blazer soon. Hopefully it helps it run smoother.
You needed to de-pressurize the fuel system before disconnecting the fuel lines. Disconnect the fuel pump and turn engine over; de-pressurized fuel system. FYI
I ran the engine until the fuel pressure dropped enough for the engine to stop.
it was acually pressure in my gas tank that forced gas out
Great posting those were some excellent camera angles I don't know where you live but I'd love for you to rebuild mine I have a 94 Silverado 5.7
one question, the black 'Y' gasket you removed that fell apart, on mine was a thicker piece and made of what appeared to be a "spacer" type material, plus it did not come in the rebuild kit so Im glad it was in good shape after cleaning it.
Also when reinstalling the regulator gasket I found it very difficult to keep it centered over the fuel inlet all while holding together and trying to get the screws started, had it go cockeyed and caused a fuel leak upon starting. Had to redo it with the help of a friend. Other than that it runs so much better now, glad i did it
so a common MOD is to install a taller Y-Gasket to allow more air to flow past the injectors. you probably had one of those spacers already.
and ya, the fuel pressure regulator is a BIT** to get on.
Holy shit dude. Looks great! Nice work!! one of the best third gen videos i've seen! Also, NOONE DOES TBI VIDEOS! So thank you so much!! Everyone is into their TPI's, TBI is where its at! (not really, but TBI's are cool too!) THAKNS AGAIN !!
can feces be holy?
Excellent video. Best I've seen. Great job!
Nice! Thanks for taking your time.
Good video. Very helpful.
Very good video, excellent job. Thanks for sharing you experience
Buen video, pero no cambiaron los microfiltros que tienen a un lado los inyectores, no realizaron prueba de carga de inyectores es provetas
Los microfiltros se cambiaron con la reconstrucción.