My 1997 gmc safari runs rough and chugs when first started, once it warms up it runs fine. What is the problem?

Asked by Jan 13, 2016 at 05:19 PM about the 1997 GMC Safari 3 Dr SLX AWD Passenger Van Extended

Question type: Maintenance & Repair

My 1997 gmc safari when cold, runs very choppy and rough. Once it warms up, after a few miles, it runs great. What could be the problem?

1 Answer

37,885

Possible temperature sending unit. This along with the 02 sensors send information to the ECM to properly adjust all the other sensors. You may want to have it scanned for codes.

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