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If air conditioning is on the car runs badly, turn air off car runs fine?

Tiny
KATHYLAWSON
  • MEMBER
  • 1999 FORD TAURUS
  • 130,000 MILES
I have a 1999 ford taurus. When I run my air conditioning there is a loud thumping noise coming from somewhere under the hood. If I do not run the air, the car runs fine. The noise is especially noticable when braking or idiling
Thursday, September 6th, 2012 AT 4:01 AM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I would see if the ac compressor is coming apart?
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Thursday, September 6th, 2012 AT 4:10 AM
Tiny
KATHYLAWSON
  • MEMBER
  • 1 POST
I'm not sure how to tell. What to look for ect. Reading posts about other peoples problems im pretty sure the ac compressor is bad. I have to drive about 5 hours on the highway in about a week. Is it safe to drive if the compressor is bad?
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Thursday, September 6th, 2012 AT 4:42 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If it only does it with the ac on you should b ok. With the engine cold an turned off see if the center of the ac compressor turns freely.
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Thursday, September 6th, 2012 AT 5:12 AM

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