CAR RUNS OK TILL I TURN ON HEATER OR AIR

  • Tiny
  • Anonymous
  • 2002 GMC Envoy
  • 97,000 miles

Car runs ok till I turn on heater or air. Then it bogs down and when sitting will die out. Can feel the drag on engine as driving. Also the compass never does the correst direction and the external temp guage in radio is always wrong

Tuesday, October 23rd, 2012 AT 2:41 PM

1 Answer

  • Tiny
  • JDL
  • Expert
  • 16,230 posts

Any applicable trouble codes? Check/clean the idle air control valve. The pcm should up the idle with hvac on.

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Tuesday, October 23rd, 2012 AT 4:00 PM

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