Join Date: Mar 2002
Location: Austin, TX, USA
Re: 89 Camaro RS starting/fuel problem
Sounds like the IAC motor may not be controlling the idle speed correctly. Vacuum leaks can also cause it. Some of those cars had a MAF that was connected by plastic duct work to the throttle body. If the duct work developed a crack or wasn't sealed up well, a vacuum leak developed that would cause drivability issues.
First step would be to determine if there are any codes set and record what they are. Be sure to get code numbers and not verbal descriptions of the codes. You may be able to get a free code read from your local autozone. If you're a techie, there is a way you can get codes out of that ECM yourself. Are you familiar with how that's done?
Whatever you do, don't start swapping parts until you have a better idea what the problem is / isn't.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI