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Thread: 454 backfire
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Old August 25th, 2011, 07:48 PM   #16
Hole tester
Join Date: 05-06-10
Location: muskegon,mi
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ive have already changed the tbi,adaptor and intake manafold gaskets
not sure on mileage its a gm reman if i had to guess 80k or so timeing chain and distrutor grear are fine starting to think its a bad vavle
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