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2006 Hummer H2

Tiny
PREM
  • MEMBER
  • 2006 HUMMER H2
  • V8
  • AWD
  • AUTOMATIC
  • 25,000 MILES
Hi, I have 2006 hummer h2 and only 25000 miles. Engine running rough for more than a year. Went to the dealer he says there is no any code. Can anybody help to find the problem. Its not running smooth. And how can I find out if there is problem with the exhaust valve. Thanks
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Wednesday, October 21st, 2009 AT 6:40 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
If it is running rough, or misfiring, it should be visible on a scan tool, and should set codes. A scan tool that shows misfire counts would offer some insight. Other things that could indicate are fuel trim values. Another possibility is that a catalytic converter could be restricting. Any of these would set an applicable fault code as they all would affect emissions.
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Thursday, October 22nd, 2009 AT 12:30 AM

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