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Old 06-20-09, 09:11 AM   #3 (permalink)
Degnol
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Join Date: Jan 2003
Location: Kansastitty
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Thanks Mike. I talked to a GM tech and he said it may be the CKP (crankshaft position sensor). That would affect timing. It bucks just like when you install a new tach and get the timing too advanced.

Ed

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