2002 Sierra Sputtering

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11-20-2015, 10:49 AM

bbuonsanto

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Join Date: Nov 2015

Posts: 2

2002 Sierra Sputtering

I have a 2002 GMC Sierra. When it is cold it will sputter on acceleration at an idle it runs perfect. After 5-10 mins it runs the sputtering goes away. What could be causing this?

11-21-2015, 03:55 PM

NullHead

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Join Date: Apr 2011

Location: Detroit, MI

Posts: 1,227

Take a look at fuel pressure, and check your intake gaskets for vacuum leaks on a cold start first thing in the morning.

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