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1997 Pontiac Grand Prix GTP Question: How to pin point misfiring cause. ..



donmoon, Wilsonville, OR, May 07, 2013, 13:32

P0300 and p0301 keep popping up and my engine shakes bad at 10 or less mph I have changed spark plugs and wires no help im not sure if my ignition controller is bad or what it just happend last week I even changed the egr and thermastat no clue and I dont think vacuum leak. .. any ideas. ..

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