Why does my van idle rough in cold weather (32 or below) at a stop, Almost dies ?

2003 GMC SAVANA
161,000 MILES
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RINKER232
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  • 2 POSTS
In cols weather only at a stop my van will drop to 100 rpm them back up to 600. you can see the head light dim. som time it does die completely, usually just idle up and down
Oct 11, 2012 at 10:24 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
If there are no trouble codes. the idle control system is not functioning correctly. Try cleaning the throttle body and IAC.
Oct 11, 2012 at 12:09 PM
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RINKER232
  • MEMBER
  • 2 POSTS
Thanks But, done that... A NAPA store told me it was my cold idle sensor, but I can't find any info on that. It only when the engine is hot but the outside temp is +- 32
Oct 11, 2012 at 12:25 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
there is no cold idle sensor. there is a coolant sensor.you need this checked from scratch.

have the fuel pressure checked first. start there

Roy
Oct 12, 2012 at 5:05 AM
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