idle on cold days

1999 CHEVROLET SILVERADO
190,000 MILES • V8 • 2WD • AUTOMATIC
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ERVAL
  • MEMBER
  • 1 POST
silverado
truck will crank in cold temp but takes 30 minutes to warm up and runs terrible to the warm up perioe 5.3

Dec 21, 2010 at 9:06 AM
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ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
First is there any check engine lights on? If so, have computer scanned. Also, water in the gas will cause this because it'll freeze at night or while sitting for long times and the engine will run rough until it passes the water.

A failing fuel pump, fuel pressure regulator will cause this as well.
Feb 4, 2011 at 4:24 AM
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