1994 Pontiac Grand Am Q&A
1994 Pontiac Grand Am Question: rough running engine
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The engine vacuum hose to the MAP sensor may crack resulting in a vacuum leak causing the engine to run rough and/or stall.
It seems to quiet down when the engine gets warmer.
My 98 Grand Am 2.5 SE is bogging on acceleration like it's starving for fuel. It's been running strong till now. 175K on the odo and we try to keep the little car up. I've changed fuel filter, fou...
no signs of vaccum leaks. head redone 1000mi. ago. fresh gas, good fuel pressure.pulled oxy sensor& ran. (bad convertor?) it runs the same.pulled p/b booster line &plugged no change...runs rough bu...