Engine dying, don't know why
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
Engine dying, don't know why
I'm a new owner, and I'm in a little over my head. I'm hoping someone here might be able to help. I just bought an 82 and have been having trouble. It's all stock engine and parts. Sometimes when I'm driving if I remove my foot from the gas pedal too fast the tachometer drops to zero and the engine shuts off. This only happens if I'm actively driving. If I try this in neutral or park nothing happens. What could the culprit be?
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
fault codes? this is efi. and it and ignition are controlled by the world's oldest efi ecm. here is a thread with a bunch of crossfire issues and how to at least start getting a handle on figuring it out. https://www.corvetteforum.com/forums...solutions.html one thought. when driving and have to stop, put it in neutral before hitting the brakes. see if it makes any diff. and when nothing else works, we still have Buccaneer... member here who is the acknowledged guru of CFI
Last edited by derekderek; May 30, 2021 at 12:16 PM.
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
fault codes? this is efi. and it and ignition are controlled by the world's oldest efi ecm. here is a thread with a bunch of crossfire issues and how to at least start getting a handle on figuring it out. https://www.corvetteforum.com/forums...solutions.html one thought. when driving and have to stop, put it in neutral before hitting the brakes. see if it makes any diff. and when nothing else works, we still have Buccaneer... member here who is the acknowledged guru of CFI
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,573
Likes: 7,015
From: New Or-leens Loo-z-anna
fault codes? this is efi. and it and ignition are controlled by the world's oldest efi ecm. here is a thread with a bunch of crossfire issues and how to at least start getting a handle on figuring it out. https://www.corvetteforum.com/forums...solutions.html one thought. when driving and have to stop, put it in neutral before hitting the brakes. see if it makes any diff. and when nothing else works, we still have Buccaneer... member here who is the acknowledged guru of CFI
he will either get mad....
OR.......
he will get Glad,
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Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Hey New owner of the 82 CFI vette. The best thing that you can have with this car is GM service manual. It is worth its weight in gold and will help you sort out things with your CFI motor. Next, I'm assuming your mechanic has never worked on a CF before and will have a problem finding things accurately because of that. Two things on these motors are VERY important as far as basics go. First is throttle body balance and the next is fuel pressure. These need to be properly set for your motor to run correctly. This is also explained in the GM manual, but it is cumbersome on the balance to understand. I have two OUTSTANDING videos on how to balance a CFI motor that you should watch or your mechanic. BTW, set the fuel pressure to 13psi, nothing less. If you have a CEL, then you must troubleshooting the codes, using the codes in order if there are multiple codes set. Do Not randomly start replacing parts, shotgun maintenance is not the answer.
If you or your mechanic needs help, PM me and I will give you my number and we can talk. Good luck with your project.
Also, if your ECM is the issue, I have you covered on that as well.
ALDL is under the ash tray.
If you or your mechanic needs help, PM me and I will give you my number and we can talk. Good luck with your project.
Also, if your ECM is the issue, I have you covered on that as well.
ALDL is under the ash tray.
Last edited by Buccaneer; May 30, 2021 at 12:29 PM.
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
Hey New owner of the 82 CFI vette. The best thing that you can have with this car is GM service manual. It is worth its weight in gold and will help you sort out things with your CFI motor. Next, I'm assuming your mechanic has never worked on a CF before and will have a problem finding things accurately because of that. Two things on these motors are VERY important as far as basics go. First is throttle body balance and the next is fuel pressure. These need to be properly set for your motor to run correctly. This is also explained in the GM manual, but it is cumbersome on the balance to understand. I have two OUTSTANDING videos on how to balance a CFI motor that you should watch or your mechanic. BTW, set the fuel pressure to 13psi, nothing less. If you have a CEL, then you must troubleshooting the codes, using the codes in order if there are multiple codes set. Do Not randomly start replacing parts, shotgun maintenance is not the answer.
If you or your mechanic needs help, PM me and I will give you my number and we can talk. Good luck with your project.
Also, if your ECM is the issue, I have you covered on that as well. ALDL is under the ash tray.
If you or your mechanic needs help, PM me and I will give you my number and we can talk. Good luck with your project.
Also, if your ECM is the issue, I have you covered on that as well.
ALDL is under the ash tray.
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Dude it's like you were summoned or your spider senses tingled or something. Thank you for answering. No, I don't believe he's ever worked on a crossfire before. I've been looking over your post that Derekderek linked and there's *so much* to take in. This'll be great! You mentioned two videos though. Where can I find those?
