what causes the #1cylinder to misfire

Asked by Nov 15, 2011 at 06:40 PM about the 2000 Pontiac Grand Am SE Coupe

Question type: Maintenance & Repair

Changed plugs, oil and filter, fuel filter, and replaced 1 of the 2 coils in the coil
pack. Checked compression on all 4 cylinders and it was good in each. The #1
cylinder spark-plug is always wet with gas after running the engine so it seems the
injectors are good. Do I need to buy the other coil and plastic housing they sit in?  
Both of my service engine soon lights on both sides of the instrument panel are
on and my trac off light is also on.

3 Answers

75

if U have the Quad 4 engine- what color is the coil housing. if black- REPLACE - if white change other coil

30

I have a 1999 pontiac grand am gt, i have changed the spark plugs and wires, fuel filter, TPS,IAC, and the purge valve.... and its still misfiring. It turns on and drives but when i get to a stop sign or to a corner to turn it turns off. I dont know what else it could be..

2 people found this helpful.

i have a 99 grand am 3.4l. mine misfired like a mother for a couple weeks till i changed the plugs. it kept misfiring so i changed out the plug wires as well. then it still misfired, so i changed the distributor cap cuz it was all gunked up and misfire was gone. try changing that.

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