Question about 2004 Pontiac Grand Am

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How come when I turn on my AC it causes my rpms to raise and then my car dies

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Your idle is set too low. Your A/C unit might need some work as well b/c, in my experience, the unit should only make a difference of about 200 RPM. So that may be making too much work for your engine if the condenser is out of tune, or your idle is just to the point that it can't take the extra drag on it.

Posted on Sep 01, 2010

  • benjamin_dav Oct 26, 2010

    well it could also be that your alternator is about gone and when you put a load on your car which could just kill it like that

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1 Answer

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