2006 Hummer H2

2006 HUMMER H2
25,000 MILES • V8 • AWD • AUTOMATIC
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PREM
  • MEMBER
  • 5 POSTS
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
Oct 21, 2009 at 6:40 PM
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FACTORYJACK
  • CAR REPAIR CONTRIBUTOR
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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.
Oct 22, 2009 at 12:30 AM
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