ParanoidPenguin

I have a 1991 C4 with 86000 miles and I'm having a few issues with it. First is that the seems to be running very rich. Its backfiring and the exhaust smells like gas. Second is i pulled the codes C41 C72 H41 and H72. Whoever had the car before me installed an aftermarket stereo so im pretty sure thats whats causing the codes. What im not sure on is when i try to go to module 4.1 and check those codes, all it gives me is ERR. And last is that the car seems to be overheating. I have already pulled the shroud off and completely cleaned the radiator so i know that thats not the problem. But my main issue is the code issue. If anyone can help me that would be great because i have had this car for just under 6 months and have already put almost $1500 into it and i am on the verge of trading it in on something different.

don hall

Informative link..... click upper left corner to change subjects:

http://www.corvettebuyers.com/c4vettes/ecm.htm