ENGINE KNOCKS WHEN I SWITCH ON THE AIR CONDITIONING

  • Tiny
  • Leoluvsit
  • 2001 Oldsmobile Alero
  • 133,000 miles

When I turn on the ac compressor my engine pulls and makes a knocking and a high pitched noise. The cooling and heat work fine but when on, it takes the power from the engine. Higher rpms and has a more difficult time picking up speed. I can hear the engine pull. If I turn off the ac the car runs fine. Is it the compressor or the engine or even vacuum leaks?

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Wednesday, November 16th, 2011 AT 4:24 AM

1 Reply

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Compressor has failed. Leave it off till you have it repaired.

Roy

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Wednesday, November 16th, 2011 AT 4:25 AM

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