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1990 Pontiac Grand Am Idle miss

Tiny
HOWARD1000
  • MEMBER
  • 1990 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 45,000 MILES
When engine is at idle speed with air condition on engine has a bad miss, increase rpm to 1500 no miss, only engine miss when air is on, and when at idle. Thanks howard
Sunday, May 30th, 2010 AT 5:25 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi Howard1000, Welcome to 2carpros and TY for the donation

Clean out the idle air control valve and test the throttle position and manifold absolute pressure. Also check the charging system alternator might be not be compensating for the AC load
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Sunday, May 30th, 2010 AT 7:19 PM

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