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Fuel system , electrical systems , spark plugs faulty or incorrectly gapped , faulty coil , brakes binding , transmission fluid level incorrect , clutch slipping , fuel filter clogged and/or inpurities in the fuel system , emissions control system not functioning properly , bad fuel ( octane ) , plugged or sestricted catalytic converter ? . Low or uneven cylinder compression pressures ( test ) will detect leaking valves and/or a blown head gasket

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19y ago
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Q: Why would a 2500 GMC van not run faster when you hit the gas?
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