My 92 RS Camaro recently had the battery die on me. The alternator is about two months or less old when this happened. Replaced the battery and it started up like a charm. A few hours later, it wouldn't start at all. Took the battery back to the shop, charged it, and it's now working again as far as I know.

Since replacing the battery, the car will now stall while idling at stoplights/signs, etc. The RPM's have always fluctuated a little bit at idle since I've got it, but it now will occasionally drop so low the engine just shuts off. I can shift the car into park and restart it immediately after it stalls out.

It doesn't behave abnormally at all while using the gas pedal, and I can keep it from stalling by pressing the gas a little. It didn't do this at all before the battery died.

With the battery problem, my friends have suggested that I have a power leak(which I think I've fixed for now by disconnecting some of my more questionable wiring and subs), but what could be causing the car to stall while idling? Logically it seems the two problems should be connected as they occurred at the same time, but I can't quite figure out how. A shorted sensor somewhere?

 

Low voltage will cause the computer to lose its mind, and the engine will die. What is the voltmeter showing at idle? It should be at least 13 volt. Also check the IAC valve which controls idle speed.

 

Check output with a meter directly at the power terminal on the alternator. That will tell you if the problem is with the alternator or something else in the charging system.