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2002 Pontiac Firebird Air conditioner keeps cutting in and

Tiny
SJDSOUZA
  • MEMBER
  • 2002 PONTIAC FIREBIRD
  • 6 CYL
  • FWD
  • MANUAL
  • 10,045 MILES
The AC of my 02 Firebird has recently started cutting in and out multiple times at idling speed at a stop light sometimes causing the engine oil pressure to drop a bit and in one case causing the engine temperature to rise beyond the median setting. The idling speed of my engine is around 750 RPM and doesnt change when the AC keeps cutting in and out (IAC motor problem?). The cooling i'd say is medium compared to other cars ive owned as this is the first summer ive owned it. At highway or even city driving conditions it behaves perfectly normal.
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Monday, July 6th, 2009 AT 3:19 PM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check cooling fans they should be on with AC
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Monday, July 6th, 2009 AT 3:35 PM
Tiny
SJDSOUZA
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  • 5 POSTS
U were perfectly right the cooling fans are not cutting in. As long as the car is moving though I have no problems with the AC. The temp holds perfectly good also while moving.
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Monday, July 13th, 2009 AT 8:25 AM
Tiny
SJDSOUZA
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  • 5 POSTS
What could be the probable cause of the cooling fans not cutting in. Where do I start troubleshooting. Thanks
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Monday, July 13th, 2009 AT 10:43 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check underhood relay/fuse box for two fan fuses and 3 fan relays. Does a fan come on when engine heats up?
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Monday, July 13th, 2009 AT 1:36 PM
Tiny
SJDSOUZA
  • MEMBER
  • 5 POSTS
The cooling fans do not cut in at alll. Then again the engine temp doesnt rise above the 210deg median setpoint
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Tuesday, July 14th, 2009 AT 7:34 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Are fuses good is there power to No. 1 relat at B3 red wire? If yes then jumper from B3 to C1 lt. Blue wire do fans come on?
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Tuesday, July 14th, 2009 AT 10:17 AM

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