Question about 2002 Pontiac Grand Am

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Is it my trans? or spark plugs? or something else?

My car drives great all thru basic use around town... As soon as I get to the highway and start to drive faster around 50 moh it starts to buck..i can still get to 70 80 mph put sometimes I have to push my foot to the floor ....

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Replace fuel filter and have the fuel pressure checked.

Posted on Jun 14, 2009

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