96 chevy misfiring when stabilizing speed at 40 mph or above
why is my truck misfiring at 40mph or
more? but i can only feel it when I stay at 40
mph or whatever the speed.
Just may need a tune up. Plugs, wires, cap & rotor, fuel filter, air filter.
Sure it is not transmission chuggle? Is it an automatic? If so you may have a TCC lock up issue. If there is a misfire it will usually happen any time under load. Check transmission fluid and flush if dirty.
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