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

Tiny
RINKER232
  • MEMBER
  • 2003 GMC SAVANA
  • 161,000 MILES
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
Thursday, October 11th, 2012 AT 5:24 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If there are no trouble codes. The idle control system is not functioning correctly. Try cleaning the throttle body and IAC.
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Thursday, October 11th, 2012 AT 7:09 PM
Tiny
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
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Thursday, October 11th, 2012 AT 7:25 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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
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Friday, October 12th, 2012 AT 12:05 PM

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