2001 Pontiac Grand Prix replacing spark plugs problems in United States

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Date:May 31, 2011, 12:44 pm
Name:Kevin Robishaw
Location:United States, Florida, Ocala
Vehicle:Pontiac Grand Prix
Year:2001
Modification:none
Problems:I replaced the spark plugs and the wires, but is still running rough, I am not sure if I used the correct plugs, what is recommended?

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Updated on April 19, 2025