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Prev Professional Automotive Repair Technical Discussions for May 6, 2015
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2002 Pontiac Grand Prix GT 3.8L Mechanical VIN: 1G2WP52K12
Customer brought this to me with a slightly rough idle. I first took the oil fill cap off as he recently replaced lower intake gasket and replaced plenum. The engine almost immediately died and I could hear vacuum coming from the oil fill cap. Somehow vacuum i...
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Fixes & Summaries for GM
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2008 Pontiac Grand Prix 3.8L Misfire VIN: 2G2WP55288
Performed a leak down test and found #6 cylinder to have a leak, removed valve cover and checked valve stem heights and both looked ok and compared to other on that bank and all looked the same. Customer declined to go any further at that point so I do not kn... Trouble codes: P0300.
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