Multiple Probs?!? [Archive] - Forum


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04-22-2006, 10:59 AM
Ok, so a few months ago, I had my alternator and my battery replaced. Today my battery light came back on, then went off after driving alittle ways. Then after work, started my car and the light came back on. What else could the problem be if I have a new battery and new alternator??? Also, my engine is reving funny. Sometimes after startup, my idle will jump to 1500-2000 right away. Other times it's normal. A)what could be causing the battery light to come on, and B) why is my engine running like this? Any ideas?


04-22-2006, 11:10 AM
i knew a girl, whose supposed battery light kept coming on... after checking it out myself, she stupidly mistook the coolant light for the battery light.... hope you're not doing the same....

your idle problem could be a faulty throttle position sensor

any modifications to the grand am?

04-22-2006, 12:02 PM
positive, since canadian models say 'low coolant' when the light comes on.

04-23-2006, 09:51 AM
check the voltage at the battery again, while it's running and when it's not

off voltage should run 12.4-12.6 and charing can vary from 13-14.5 volts depending on how low the battery is.

Charge should smooth out to a 13-13.6 or so generally after a few minutes