Why does my 2002 6.0 vortec engine idle rough and miss in cold weather after it's cranked

Asked by Jan 17, 2014 at 09:05 PM about the Chevrolet Silverado 2500HD

Question type: Maintenance & Repair

3 Answers

30

idle control valve

3 of 3 people found this helpful.
30

It's not the iac, changed mine and its the same. Also changed the MAS, MAP, Temp sensor, and fuel filter. Still runs rough on cold start ups but levels out when the truck hits running temp. Fuel pump?

3 of 3 people found this helpful.
370

Intake manif old gaskest

2 of 2 people found this helpful.

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