1991 chevy pick 350 up bogs down when give the gas to accelerate. But there are times that it runsgreat . changed the coolant temp sensor fuel filter added octaine booster to fuel any ideas?
TPS , EGR, MAP ? an intermittent problem is the worst , those items would have to be tested when the problem occurs , when it's running great they will test normal , give the throttle a blast of carb cleaner
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