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Re: tune up/ mass air flow question
I would start with putting factory plugs back in it first.
You may even try new O2 sensors. We had couple trucks come in with bad O2s causing misfires.
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70 C10 SWB stepside forsale
00 Silverado Z71 Sold 
95 Eagle Talon TSI turbo (Hellz ya its fast)
70 Chevelle
69 firebird
10 Silverado 4x4
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