egr issue?
Thread Starter
Intermediate
Joined: Sep 2008
Posts: 36
Likes: 0
From: Monroe GA
egr issue?
Hello all, My 88 corvette with 383 stroker with all modified factory TPI. is starting to stall with no warning.I can let it sit a few and it will start again and stall immediately.I try to feather the pedal as it starts to die with no reaction.Now it happened tonight again except that the car had terrible emission smell from the exhaust.. It smelled like a 1970 v-8 that had been off the road for a decade.you know that eye burning ,have to pass car smell.Again I can start it and it may run a minute and die or run 10 min.I have checked it has fuel at the rail and appears to have spark.If it is under acceleration it will run longer but still dies.Can anyone point me in the right direction?!!
Burning Brakes
Joined: Apr 2004
Posts: 762
Likes: 2
From: Huntington ma
Doesn't sound like anything that the EGR could do to it. If you want to be certain unplug the vacuum to the valve (and plug the hose to prevent a vacuum leak). That will cause the valve to stay shut (assuming it IS shutting and not stuck open..) and eliminate any possibility of it opening and causing a problem.
I'd place my money on the MAF...
Just a question - why do you have the EGR still on the thing Anyhow?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I'd place my money on the MAF...
When the MAF in my '88 Vette went out I could hardly start it and keep it running long enough to back it into the parking spot.
Unplugging the MAF didn't help my Vette to run any better so it was pretty useless as a diagnostic method. So I swapped in the MAF from my '86 IROC-Z and she ran fine; still using that MAF today.
I suggest you pick up a used MAF from an mid-'80s F-body TPI car from a bone yard for a few $$ to see if that is the problem.
Of course you might try replacing the MAF power relay first...
Thread Starter
Intermediate
Joined: Sep 2008
Posts: 36
Likes: 0
From: Monroe GA
If I wanted to swap from TPI to carb what would I lose in performance and fuel economy?I had to many problems getting this engine to run correctly.No one I can find knows how to get this car running.I have spent at least 1000.00 just to set timing and burn a chip and then say to me that I need to spend more to fine tune it! holly c_ _ I would like to keep the factory look but I need to drive it also.Can yall help to figure which is the best way to go.I am open for suggestions!!!! th_.https://www.corvetteforum.com/forums...ies/frown5.gif
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
I would give a shout-out to the C4 peeps in the Southest section of the country for a helping hand. You may find another C4 owner the next town over who may be willing to take a look at things for you.
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Thread Starter
Intermediate
Joined: Sep 2008
Posts: 36
Likes: 0
From: Monroe GA
Mystery solved
Well after a week at Kirks Speed shop we found the driveability issue.No, not egr or map issue. ecm chip holder is broken and chip is not connecting as should be.Some time it works and some times not.Now can anyone tell me if the holder itself can be replaced or is it time for a new ecm?I dont have the ecm to check myself so I hope someone can tell me.By the way, anyone in the Atlanta area that needs a performance shop that will do do dilligance call these guys at Kirks Speedshop in Monroe Ga.. Awesome folks.