1992 corvette.
Thread Starter
1st Gear
Joined: Nov 2017
Posts: 1
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1992 corvette.
My 1992 lt1 corvette idles in park ok exhaust smells acidic. Runs good in gear gets up and goes. When I half to stop at light at idle some times it shuts off. Chevey dealer said there are no codes. What could be causing this I am new to car and your blog.
Le Mans Master
Joined: Feb 2005
Posts: 6,475
Likes: 565
From: Clearwater Florida
..... Check the fuel pressure regulator's vacuum hose for any signs of liquid gasoline ... or , a possible faulty fuel injector , IAC valve , minimum idle setting , TPS , etc. .....
Team Owner
Joined: Jul 2004
Posts: 28,377
Likes: 3,260
From: Hartford WI
If you don't have one, and it sounds like you don't, find a scanner capable of reading live data from the ECM. I would suspect that your Throttle Body is dirty. You will have to remove it and the IAC and the IAC housing to clean the passages and then reset it.
Melting Slicks
Joined: Feb 2015
Posts: 2,069
Likes: 262
From: Park Ridge New Jersey
Team Owner
Joined: Jul 2004
Posts: 28,377
Likes: 3,260
From: Hartford WI
I'd get it to stable operating temperature and shut everything but the motor off. Check the IAC counts and turn the adjustment screw in or out based on the counts. More counts mean the ECM is wanting more air. IOW, you need to open the throttle blades by turning the screw in. Rev and recheck. Target is 20-30 counts. If it is 0 counts, you need to turn the screw out. Trick is, if you can't turn the screw out anymore and the blades are closed as far as they can go, you are getting air in somewhere and that means a leak.
