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. ..
How to pin point misfiring cause. .. on 1997 Pontiac Grand Prix GTP
Asked by for the 1997 Pontiac Grand Prix GTP
GET PROPER DIAG IT COULD BE COIL ISSUE