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The air conditioning unit on my 2005 Cavalier only engages when the engine is idling above a certain level (observationally, it appears to be between 1000 and 1200 rpm).

During the summer months, then, I would like to adjust the idle rpm of the engine so that the AC runs even when sitting still.

How would I do that?

Other car specs (if needed):

  • 4 cylinder
  • automatic
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I suspect something is wrong with your AC system if the compressor is not running at idle, assuming you're idling at the correct RPM. Maybe a bad RPM sensor on the compressor?

Changing your engine idle is going to require editing your PCM. If you're not idling in the correct range, check your IAC.

  • fwiw - I had an Escort station wagon years back that did the same thing .. and it was "by design" – warren Apr 12 '12 at 13:24

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