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#3
07-27-2007, 12:48 AM
Hummer Expert
Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
Re: 2003 H2 Question
the right heat range NGK plugs will be as good as the AC delco plugs.if the idle is going up and down I would take a hard look at your mass air sensor,they can be bad and not throw a code. I wouldnt hurt to decarb the engine and clean the throttlebody also.
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