Thank you for sharing, I appreciate your work on T/A 1982 Crossfuel Injection, I am in the process of rebuilding my engine on my TA 82 with the same Crossfuel injection system, and your video had answered many of my questions, thank
I have found my new favorite channel! thanks for showing how to work on these cars. There tricky, especially with the 10 pounds of vacuum on my 82 vette. They can go wrong at any moment.
THIS!!!!! I bought my son a 1984 corvette with the crossfire. When asking for help from some of the forums, the amount of comments i got from people telling me to just put a carb on it was insane. I’m trying to teach my 16 year old how to work on cars, not just give up and put a damn fuel toilet on. Ours had a ton of issues, I’ve sorted most of them. Now I have to do a sync, set initial timing, and set my TPS. Tons of people badmouth this injection, it’s legitimately all in the service manual!! Crack that book open, and don’t try to be smarter than GM.
i agree with the people trash talking the small block and the crossfire injection i have a couple fiero's that have the tbi system in them but i got an 84 vette and it has a misfire when it's cold and it was steaming alot out of the pipe but it didn't smell like coolant i was wondering if you think a vacuum leak will cause that or if it's an intake gasket
Joe I have an issue with my 82 vette 350. I had issues of the car not wanting to crank back up after it was warm. Tested fuel pump pulse on cold start up and it works as expected. After its warmed up I can shut the car off and it wouldn't start back up. Retested for fuel pulse and got nothing! Tested relay and eventually found out the relay is getting hot and not working after that. Changed the relay and fixed the restart issue. My concern is that the new relay is getting hot too. About 130 degrees hot. Is that normal? And just so you know I replaced the fuel sending unit with the new relay just to rule out a bad fuel pump that may have had some resistance. What are your thoughts on the relay?
0:21 "Everything needs to function properly" Yep this is true. Ripping my 84 Corvette around San Diego/La Mesa today I have lots of mods, AFR heads, crane cam, Renegade intake, full length headers ect. Having a blast. Just about to get a laptop so I can install and tune the Dynamic EFI EBL Flash II system I already bought. Truth be told the car is running great on the stock ECU with fuel pressure mods so I'm very curious how much the EBL will help.
Very cool! Sounds like a nice car! I’ve been looking into the EBL and HAM board. Mine is still basically stock for the most part. Just making the best of what I have for now. I absolutely love Crossfires. Been messing with them and daily driving them for 25 years.
I still have my 1983 z28 cross fire camaro I bought it new in my last year of high school , It a labor of love and also a time machine back to another time and place along with the music . I have do things to upgrade the car and keep it running it has 51 K org miles . Do you know where I can find a TBI balance gauge you used and do they make a vacium line replacement kit ( wishful thinking )
Great video, I’m in the market for a 1982 Corvette, thank you for the info on the crossfire injection system, a question, what vehicle do you have in this video? I can’t tell lol!! Mike
Hi, thank you for the informative video. On my CFI 305, 83. Pontiac the revs stay high at temp, in neutral 1200rpm. Starts with a rough idle then clears when warm and driving after 5 minutes.. feels good when driving at speed? I have changed CO2, coolant temp sensor.. I was hoping to do the IAC next?
Any performance upgrades/add-ons you recommend? Minus the renegade intake. From my understanding there's little to none on the crossfire platform? Appreciate any feedback. Thanks 👍🏽
Definitely. Aside from the normal; bumped timing, headers and exhaust, CFI cars benefit greatly from a bump in fuel pressure (13-14psi) and HEAVILY porting the intake manifold. Larger bore TBs aren’t necessary until you get more serious into a build (heads, cam, etc). A ported base will support a good bump in HP. As far as a cam, keep your LSA around 112-116 and you’ll be fine with the stock 5055/6026, or a newer 7747/8746 ECM. There are some hard running CFI cars out there, and people badmouth what they don’t understand. It doesn’t take much at all to wake them up.
Just bought an 83 Camaro with the 305 crossfire. Guy had it fully rebuilt but never got to install it. Just got old and life got in the way. Getting ready to put the engine back in. Any tips?
Yes, it uses a standard CCC distributor. You can get one from any CFI or LG4 car, or use an L03/L05 distributor with a divorced coil. Just do a little rewiring. Easy job.
I feel like I'm about find a lot of info I need for my 84 c4 thank you for taking the time to make these videos as a young kid not from that time and and have little understanding this helps because people never understood this system do there's little no information about anything crossfire injection
@@Joesmusclecargarage I have a 1982 Z28 Indy pace car with Crossfire injection I can't get valves on the air induction hood to open at throttle. However they will open remotely if we send an electric charge directly through the harness. Is this a typical problem that owners have had or do you have an idea why mine won't open it full throttle?
I enjoyed my 82 vette. I liked the crossfire injection. I guess I was lucky. One thing I didn't care for was that they used steel bolts to secure the thermostat housing to the aluminum intake manifold. So, when I went to replace the thermostat, the bolt was corroded to the manifold. It can be a bitch so be careful.
Yep. That goes with any aluminum manifold, heads, etc. Mine were stripped when I got the car, so I used time-serts. I always use anti seize compound on fasteners going into aluminum.
First and foremost I would go through the fuel system. New pump, clean out the lines, and cross your fingers the injectors are still good. Other than that, it’s just normal stuff. Check over the wiring, vacuum lines, etc. If it really has been sitting for 20 years, it would be a good idea to shoot some oil into the cylinders so the rings have a little bit of lube until it fires up. Once it’s running, you can go one other things like timing, TB balance, etc.
Considering removing egr valve on my TBI. Do you have any suggestions where to move vacuum line or plug ? Hate to add to vacuum leaks these things are prone for, but its only part of the system left
Just cap the line coming out of the EGR solenoid. You’ll be prone to pinging with the EGR disabled. A functioning EGR reduces combustion chamber temperatures, allowing for more timing. Is this on an LU5/L83 or an L03/L05? Without going into the PROM, the ECM will assume the EGR is still functioning and will continue to add timing when it goes to enable the EGR. You’ll need to tune the EGR control out of the PROM. Or…retard the base timing if you’re not going into the PROM.
Quick question - I'm hearing a ticking sound from the rear (driver side) TBI - is this a sign it's going bad? I can actually hear it while idling and I'm sitting in the driver's seat. LMK when you get a chance - thanks!
Are you sure it’s coming from the TB? It could be a rocker or lifter. TBI injectors naturally make noise, as do IACs. My passenger side (front) injector is the louder of the two on my car. See if you can get ahold of a stethoscope or a length of heater hose to better isolate the source of the noise.
If you want to get picky, this setup is a pair of throttle bodies off the 2.5L 4-cylinder. GM wanted to put fuel injection on the V8 in the Corvette and F-body, but they didn't have a suitable throttle body already developed, so they came up with Crossfire as a marketing gimmick that allowed use of two throttle bodies that were half as big as they needed to be for the V8. Then they ended up with the compromised intake runners to meet emissions requirements...
@@KevinJames-yg9eu the only problem i ever had with TBI is the MAP sensor was electrically good but was mechanically bad, funny the MAP of the TBI and the TPI were the same.
I have an 82 Z28 with a 305 Crossfire that I can't get to idle below 1700 rpm. I have looked for vacuum leaks none found. Replaced both idle air control solenoids, checked timing, replaced pvc valve, replaced egr valve. Any ideas ?
My son acquired a 83 trans am Daytona 500 edition the air management valve is missing can you please give me a close up of what it looks like or a place to purchase thank you!!
If you are referring to the diverter valve for the A.I.R. system, the correct one has been discontinued for a very long time. I’ll take some pics of mine though. What’s your email address?
Hey man great video. Hey so my 84 when I do a hard pull it acts like it wants to stall when I’m still hard on gas then I tap the gas and it fixes itself. Any idea if this is something with the crossfire?
@@patman7873 Start with the basics; check your timing, check your fuel pressure. A TB imbalance won’t make it fall on its face, and would usually cause a rough idle, and a little flat spot. Be 100% sure you have NO vacuum leaks, from the diverter valve, EGR, MAP, EVAP hoses, plenum gasket, etc.
Thanks someone just gave me an 85 with 38k miles. Starts but ruff.havent had time to look at it. The guy told me the header it glows red after few minutes of running.whum. Sounds like a mouse nest in exhost pipe. could be cause for ruff running. Guessing tho no clue.
I have a 1982 collertors edition, and it just stopped running after we moved. Sat for 2 years. I have replaced the fuel pump, fuel hoses, injectors, inginition air sensors, and pretty much drained all the fuel. I also replaced the fuel relay. I can get it to start and run if I spray starter fluid in the intake, but it stalls out shortly after I stop. I can see some fuel spitting in thers but not a clean spray. Any ideas on where Im going wrong. Thanks
@@Joesmusclecargarage innectors are new and working fine. Fuel pressure is good and fuel pump is new. It starts but just wont idle. Vac hoses appear to be all good. Im at a loss here. It will run if I squirt fuel into the TB. I just dont understand
First of all, they aren’t carbs. Crossfire Injection is throttle body injection, ie EFI. Second, how do you know it is running rich? Are you still using the factory CTS?
My 83 crossfire Camaro surges real bad alot of the time at idle, it will rev from like 1500 to 2000 rpm but only when idling what could this be? I have replaced the IACs and EGR and the only real modifications I've done was put shorty headers and remove the smog stuff, but it has surged always even before I done anything to it
@@Joesmusclecargarage it will idle down to about 1k on after it warms up a bit when I first start it, but after driving a bit when I put it in neutral or clutch in at a stop it will surge, probably about 60% of the time, and I have not messed with the throttle bodies at all besides put new gaskets
I would start by balancing the throttle bodies and setting the minimum air, then the TPS to .525V. The high idle is normal during initial cold start and warmup though, however 2000rpm is too high. Once everything is set properly, the surging should stop.
@@Joesmusclecargarage thanks for the info I see you have a video on how to balance the throttle bodies I will definitely be trying out the info you gave me and see what happens, I appreciate the advice thanks!
I agree with the simplicity of the CFI engine and would concur that it can be made to run smooth. However, the limitations on the ECM timing advance are very restrictive at best. You are dependent on limited ECM flash availability so to get more power you are looking to increase the throttle body bore. So in short, you can't compare the limitless LS to the restrictive L83. In saying as much, I do not claim to be the CFI or TBI expert by any means. But I have built many 377/383 strokers and I am not convinced that you will ever see 400hp without eliminating the whole system including the ECM.
@@Joesmusclecargarage thank you soooo much for the quick reply. I'll see what I can do to get mine up. Gives me a number to shoot for knowing yours runs so we'll. A huge thanks again for the quick reply!!!!
Definitely shoot for 13. That’s a good starting point for even a bone stock car. You’ll notice the difference in idle quality as you increase the fuel pressure. Once you pass 11psi or so, it’ll start to smooth out and immediately becomes more responsive.
@@BlownC52000 I guess to someone such as yourself that allows 40+ year old technology to outsmart them. There are full interior CFI street cars well into the 11s. It’s too bad such a simple and reliable EFI system is beyond your realm of understanding. Thanks for making it public for everybody! 🤣👍
the only thing wrong with these systems was the idiots that attempted to repair or modify them . Its great to see one thats well maintained ............the 80s were great times
Good morning. Very good video my friends. I had a 1982 Corvette with the Crossfire. In the years I had it I never had any issues. Have a good weekend.
Thank you for sharing, I appreciate your work on T/A 1982 Crossfuel Injection, I am in the process of rebuilding my engine on my TA 82 with the same Crossfuel injection system, and your video had answered many of my questions, thank
Outstanding content here. Thanks for taking the time to post this video. Subscribed.
Nice! Keep up the fight defending CFI cars!!
I have found my new favorite channel! thanks for showing how to work on these cars. There tricky, especially with the 10 pounds of vacuum on my 82 vette. They can go wrong at any moment.
No problem! I know these CFI cars like the back of my hand, stock and modified. Let me know if you have any requests for how-to videos 👍
It is time... for some EBL and HAM excitement. Thanks for the greatness on your channel.
Thank You so much for such a quick response!
Nice job as usual 😉
THIS!!!!! I bought my son a 1984 corvette with the crossfire. When asking for help from some of the forums, the amount of comments i got from people telling me to just put a carb on it was insane. I’m trying to teach my 16 year old how to work on cars, not just give up and put a damn fuel toilet on. Ours had a ton of issues, I’ve sorted most of them. Now I have to do a sync, set initial timing, and set my TPS. Tons of people badmouth this injection, it’s legitimately all in the service manual!! Crack that book open, and don’t try to be smarter than GM.
mines running really nice ..no leaks.
cool video
i agree with the people trash talking the small block and the crossfire injection i have a couple fiero's that have the tbi system in them but i got an 84 vette and it has a misfire when it's cold and it was steaming alot out of the pipe but it didn't smell like coolant i was wondering if you think a vacuum leak will cause that or if it's an intake gasket
Joe I have an issue with my 82 vette 350. I had issues of the car not wanting to crank back up after it was warm. Tested fuel pump pulse on cold start up and it works as expected. After its warmed up I can shut the car off and it wouldn't start back up. Retested for fuel pulse and got nothing! Tested relay and eventually found out the relay is getting hot and not working after that. Changed the relay and fixed the restart issue. My concern is that the new relay is getting hot too. About 130 degrees hot. Is that normal? And just so you know I replaced the fuel sending unit with the new relay just to rule out a bad fuel pump that may have had some resistance. What are your thoughts on the relay?
0:21 "Everything needs to function properly" Yep this is true. Ripping my 84 Corvette around San Diego/La Mesa today I have lots of mods, AFR heads, crane cam, Renegade intake, full length headers ect. Having a blast. Just about to get a laptop so I can install and tune the Dynamic EFI EBL Flash II system I already bought. Truth be told the car is running great on the stock ECU with fuel pressure mods so I'm very curious how much the EBL will help.
Very cool! Sounds like a nice car! I’ve been looking into the EBL and HAM board. Mine is still basically stock for the most part. Just making the best of what I have for now. I absolutely love Crossfires. Been messing with them and daily driving them for 25 years.
how do you get a renegade, i know they stopped making them however im looking all over for people selling them and cant find any for sale.
@@coochieslayer6983 That is going to remain a secret. I won’t reveal my Renegade source.
I still have my 1983 z28 cross fire camaro I bought it new in my last year of high school , It a labor of love and also a time machine back to another time and place along with the music . I have do things to upgrade the car and keep it running it has 51 K org miles . Do you know where I can find a TBI balance gauge you used and do they make a vacium line replacement kit ( wishful thinking )
It’s a slack tube water manometer. You can buy one, or make one for about $5. There was never a “kit” for the vacuum lines.
Great video, I’m in the market for a 1982 Corvette, thank you for the info on the crossfire injection system, a question, what vehicle do you have in this video? I can’t tell lol!! Mike
83 T/A
Hi, thank you for the informative video. On my CFI 305, 83. Pontiac the revs stay high at temp, in neutral 1200rpm. Starts with a rough idle then clears when warm and driving after 5 minutes.. feels good when driving at speed? I have changed CO2, coolant temp sensor.. I was hoping to do the IAC next?
Any performance upgrades/add-ons you recommend? Minus the renegade intake. From my understanding there's little to none on the crossfire platform? Appreciate any feedback. Thanks 👍🏽
Definitely. Aside from the normal; bumped timing, headers and exhaust, CFI cars benefit greatly from a bump in fuel pressure (13-14psi) and HEAVILY porting the intake manifold. Larger bore TBs aren’t necessary until you get more serious into a build (heads, cam, etc). A ported base will support a good bump in HP. As far as a cam, keep your LSA around 112-116 and you’ll be fine with the stock 5055/6026, or a newer 7747/8746 ECM. There are some hard running CFI cars out there, and people badmouth what they don’t understand. It doesn’t take much at all to wake them up.
Just bought an 83 Camaro with the 305 crossfire. Guy had it fully rebuilt but never got to install it. Just got old and life got in the way. Getting ready to put the engine back in. Any tips?
Great video, Question does the early TBI need a computerized distributor, I found a complete set up for $200 minus a distributor
Yes, it uses a standard CCC distributor. You can get one from any CFI or LG4 car, or use an L03/L05 distributor with a divorced coil. Just do a little rewiring. Easy job.
I feel like I'm about find a lot of info I need for my 84 c4 thank you for taking the time to make these videos as a young kid not from that time and and have little understanding this helps because people never understood this system do there's little no information about anything crossfire injection
Well I’m a pro when it comes to CFI. Definitely ask any questions you may have or if you have a request for a specific video.
@@Joesmusclecargarage thank you and thanks for recommending the FB group as well you are one of the GOAT's
@@Joesmusclecargarage I have a 1982 Z28 Indy pace car with Crossfire injection I can't get valves on the air induction hood to open at throttle. However they will open remotely if we send an electric charge directly through the harness. Is this a typical problem that owners have had or do you have an idea why mine won't open it full throttle?
@@stevenhall9009 The air induction flaps are ECM controlled. Check the relay for power coming in. The ECM provides the ground to activate the relay.
@@Joesmusclecargarage Hey thanks for the information, I'll try it.
I enjoyed my 82 vette. I liked the crossfire injection. I guess I was lucky. One thing I didn't care for was that they used steel bolts to secure the thermostat housing to the aluminum intake manifold. So, when I went to replace the thermostat, the bolt was corroded to the manifold. It can be a bitch so be careful.
Yep. That goes with any aluminum manifold, heads, etc. Mine were stripped when I got the car, so I used time-serts. I always use anti seize compound on fasteners going into aluminum.
I’ll be picking up an 83’ Camaro Crossfire 305 later this week. The car has been sitting for 20 years. Any tips for getting started?
First and foremost I would go through the fuel system. New pump, clean out the lines, and cross your fingers the injectors are still good. Other than that, it’s just normal stuff. Check over the wiring, vacuum lines, etc. If it really has been sitting for 20 years, it would be a good idea to shoot some oil into the cylinders so the rings have a little bit of lube until it fires up. Once it’s running, you can go one other things like timing, TB balance, etc.
Considering removing egr valve on my TBI. Do you have any suggestions where to move vacuum line or plug ? Hate to add to vacuum leaks these things are prone for, but its only part of the system left
Just cap the line coming out of the EGR solenoid. You’ll be prone to pinging with the EGR disabled. A functioning EGR reduces combustion chamber temperatures, allowing for more timing. Is this on an LU5/L83 or an L03/L05? Without going into the PROM, the ECM will assume the EGR is still functioning and will continue to add timing when it goes to enable the EGR. You’ll need to tune the EGR control out of the PROM. Or…retard the base timing if you’re not going into the PROM.
Quick question - I'm hearing a ticking sound from the rear (driver side) TBI - is this a sign it's going bad? I can actually hear it while idling and I'm sitting in the driver's seat. LMK when you get a chance - thanks!
Are you sure it’s coming from the TB? It could be a rocker or lifter. TBI injectors naturally make noise, as do IACs. My passenger side (front) injector is the louder of the two on my car. See if you can get ahold of a stethoscope or a length of heater hose to better isolate the source of the noise.
I'd say put a screw driver up to a valve cover and listen,most likely a lifter- do engine flush, fresh oil.
Mine had a ticking noise from the rear. The distributor rotor screws had backed out, and the rotor was self-destructing on the cap.
I was curious about running the ECU and the dual throttle bodies on top of a blower set up. Any thoughts?
The 5055/6026 can barely handle a mild cam. Your best bet would be to run an 8746/7747 with EBL, or just switch to a standalone.
Hmm this is where the TBI setup came from. Pretty common Injector and IACV/TPS. Even fuel reg layout looks the same.
If you want to get picky, this setup is a pair of throttle bodies off the 2.5L 4-cylinder. GM wanted to put fuel injection on the V8 in the Corvette and F-body, but they didn't have a suitable throttle body already developed, so they came up with Crossfire as a marketing gimmick that allowed use of two throttle bodies that were half as big as they needed to be for the V8. Then they ended up with the compromised intake runners to meet emissions requirements...
Yep. Rochester Model 400 throttle bodies. It’s a super reliable setup and incredibly easy to get good power gains out of.
@@Joesmusclecargarageif I wanted to keep TBI I would use the 454 TBI with adjustable diaphragm
@@KevinJames-yg9eu the only problem i ever had with TBI is the MAP sensor was electrically good but was mechanically bad, funny the MAP of the TBI and the TPI were the same.
I have an 82 Z28 with a 305 Crossfire that I can't get to idle below 1700 rpm. I have looked for vacuum leaks none found. Replaced both idle air control solenoids, checked timing, replaced pvc valve, replaced egr valve. Any ideas ?
Well something is hanging the idle. Is one of the TBs hanging open? Did you do a base idle reset after you replaced the IACs?
My son acquired a 83 trans am Daytona 500 edition the air management valve is missing can you please give me a close up of what it looks like or a place to purchase thank you!!
If you are referring to the diverter valve for the A.I.R. system, the correct one has been discontinued for a very long time. I’ll take some pics of mine though. What’s your email address?
I guess you can’t put email in comments is there a replacement part for the original? Thanks any info is appreciated
@@TheDse186 Email me at roccojakubec@yahoo.com
Hey man great video. Hey so my 84 when I do a hard pull it acts like it wants to stall when I’m still hard on gas then I tap the gas and it fixes itself. Any idea if this is something with the crossfire?
I’m not sure what you’re talking about. Can you explain the scenario a little better?
@@Joesmusclecargarage so when I were to get on it hard from a stop it wants to stall and I have to feather the gas to keep it going
@@patman7873 Start with the basics; check your timing, check your fuel pressure. A TB imbalance won’t make it fall on its face, and would usually cause a rough idle, and a little flat spot. Be 100% sure you have NO vacuum leaks, from the diverter valve, EGR, MAP, EVAP hoses, plenum gasket, etc.
@@patman7873 Does it only do it when you hit it from a stop off idle, or does it fall on its face throughout the entire RPM range?
Thanks someone just gave me an 85 with 38k miles. Starts but ruff.havent had time to look at it.
The guy told me the header it glows red after few minutes of running.whum.
Sounds like a mouse nest in exhost pipe.
could be cause for ruff running.
Guessing tho no clue.
Well an 85 isn’t a CFI. Is it an LG4, L69, or LB9?
I have a 1982 collertors edition, and it just stopped running after we moved. Sat for 2 years. I have replaced the fuel pump, fuel hoses, injectors, inginition air sensors, and pretty much drained all the fuel. I also replaced the fuel relay. I can get it to start and run if I spray starter fluid in the intake, but it stalls out shortly after I stop. I can see some fuel spitting in thers but not a clean spray. Any ideas on where Im going wrong. Thanks
Verify injector pulse with a noid light. Verify fuel pressure.
@@Joesmusclecargarage innectors are new and working fine. Fuel pressure is good and fuel pump is new. It starts but just wont idle. Vac hoses appear to be all good. Im at a loss here. It will run if I squirt fuel into the TB. I just dont understand
I have a 82 corvette with the crossfire carbs. Mine idles too rich. How can I adjust the richness?
First of all, they aren’t carbs. Crossfire Injection is throttle body injection, ie EFI. Second, how do you know it is running rich? Are you still using the factory CTS?
@@Joesmusclecargarage
Took it to get smogged 3 times over 4 months. It passes all other requirements. It fails the idle
Again, are you still running the factory CTS? What’s your base timing at?
@@Joesmusclecargarage I don’t know the base timing. I’m unaware of the CTS was changed
Check the base timing and replace the CTS and pigtail. It’s worth the $20.
My 83 crossfire Camaro surges real bad alot of the time at idle, it will rev from like 1500 to 2000 rpm but only when idling what could this be? I have replaced the IACs and EGR and the only real modifications I've done was put shorty headers and remove the smog stuff, but it has surged always even before I done anything to it
Have you verified proper synchronization of the throttle bodies? Will it ever idle down or is 1500-2000 the lowest it will ever get?
@@Joesmusclecargarage it will idle down to about 1k on after it warms up a bit when I first start it, but after driving a bit when I put it in neutral or clutch in at a stop it will surge, probably about 60% of the time, and I have not messed with the throttle bodies at all besides put new gaskets
I would start by balancing the throttle bodies and setting the minimum air, then the TPS to .525V. The high idle is normal during initial cold start and warmup though, however 2000rpm is too high. Once everything is set properly, the surging should stop.
@@Joesmusclecargarage thanks for the info I see you have a video on how to balance the throttle bodies I will definitely be trying out the info you gave me and see what happens, I appreciate the advice thanks!
I want to put this on my 73 elcamino, stock 350
Wouldn’t be a difficult swap at all 👍
I agree with the simplicity of the CFI engine and would concur that it can be made to run smooth. However, the limitations on the ECM timing advance are very restrictive at best. You are dependent on limited ECM flash availability so to get more power you are looking to increase the throttle body bore. So in short, you can't compare the limitless LS to the restrictive L83. In saying as much, I do not claim to be the CFI or TBI expert by any means. But I have built many 377/383 strokers and I am not convinced that you will ever see 400hp without eliminating the whole system including the ECM.
I never compared an LS/Gen III/Gen IV to a CFI. Any there are quite a few CFI street cars deep in the 11s with an 8746 ECM with EBL.
@@Joesmusclecargarage - Does the 8746 allow more advance ?
@GetsumJ It’s tuneable with EBL flash. The factory 5055/6026 ECMs are not.
Do you know what fuel pressure you are running now. I think that's a lot of problems with them.
Of course I know. I set it. It’s right at 14psi. Most of the “untouched” cars I have seen are around 9-10psi
@@Joesmusclecargarage thank you soooo much for the quick reply. I'll see what I can do to get mine up. Gives me a number to shoot for knowing yours runs so we'll. A huge thanks again for the quick reply!!!!
Definitely shoot for 13. That’s a good starting point for even a bone stock car. You’ll notice the difference in idle quality as you increase the fuel pressure. Once you pass 11psi or so, it’ll start to smooth out and immediately becomes more responsive.
have you a facebook ? your movie really help me for my 83 crossfire but have many questrions to resolve my problems thanks !
Yes. I’m in the Crossfire Injection group.
@@Joesmusclecargarage dont find it..
@@jeanlucmartin2473 email me roccojakubec@yahoo.com
After everything , I am getting only a part throttle "ping" under mild pull. any other time seems OK
What’s your timing and fuel pressure set at?
Setting
Right at 14psi running, about 10 ° in gear w/diag wire disconnected. Setting at 800 idle.
About 20 inches vac, on the map.
1984 corvette
Your knock sensor and ESC functioning properly?
Why not convert to carb
What would be the point of that?
@@Joesmusclecargarage because cross fire is garbage?
@@BlownC52000 I guess to someone such as yourself that allows 40+ year old technology to outsmart them. There are full interior CFI street cars well into the 11s. It’s too bad such a simple and reliable EFI system is beyond your realm of understanding. Thanks for making it public for everybody! 🤣👍
2 throttle bodies
What?
If there's one thing I know the LU5 is a great engine it's just the (word or mouth) that took them down. Too bad theres not more not like you
@@Joesmusclecargarage I just like them better then the one like mine I’d rather deal with fuel injection then a carb
How can you say that if you’ve never seen one, driven one, or worked on one?
@@Joesmusclecargarage I’ve seen yours and how it’s set up I like it far more plus the tools used are pretty cool
So no different from any other engine with a vacuum leak. They all run like trash
Except a CFI runs much worse with even the slightest vacuum leak. I suggest you work on a few before you run your yap. Capisce?
the only thing wrong with these systems was the idiots that attempted to repair or modify them . Its great to see one thats well maintained ............the 80s were great times
Agreed. They were misunderstood, and still are. They are one of the simplest, easiest to maintain, and most reliable systems ever.