my car starts but is missing (miss fire code) causing lose of power and rough idle
Asked by cgaydou Nov 04, 2015 at 07:49 PM about the 2007 Pontiac Grand Prix Base
Question type: Maintenance & Repair
My car (07 grand prix) is missing on 2 cylinders thinks is 2 and 4 I replaced
coil pack but no change (old coil was still good) tested to the best of my ability
the ignition module and I'm getting power there and power to my crank
position sensor what else am i missing and why can't I find the cause of my
multi miss fire?
12 Answers
Did you also change the spark plugs? If the plugs are shot then changing the coils won't help.
spark plugs probably need changed yes but the coil pack itself is not firing replaced it still no fire on a new coil swapped my old coil out with one of the other coils and it fires
Mine did the same thing. Changed plugs and wires and wala' - fixed.
Coil has to be fireing before it warrants changing plugs
Not sure how you were testing your coil but I think you should still consider the plugs. Does this car also have ignition wires? They too could be the cause for misfires. Does the car have a single coil unit or one for each cylinder? Different techniques would be used to troubleshoot. What happened when you put the "old coil" back in? you said it worked but did the miss stop?
Did you ever figure it out I am having the exact same issue changed coil pack plugs but the coil is not firing to the plugs nothing no spark?
ManiacleKnine1 answered 4 years ago
I’m having the exact same issue myself, mines a 05 and I put a new coil pack on but it’s still getting no power. The other two packs are fine. Any thoughts?
ManiacleKnine1 answered 4 years ago
Revisiting here to let you guys know what worked for me, I replaced the ignition control module and everything is working great now, hope this helps anyone having the same issue.
Quintin6914 answered 4 years ago
I replaced plugs & wires. All 3 coils. And the control module. Still not fixed.
Has anyone figured this out I’m haveing same issue cylinder 1 and 4 coil pack 06 grand pre
Mines is still doing the same. I replaced all coil packs, wires, plugs, ignition control module, and one of the fuel injectors. I'm lost as to what should I do next. I have a 2006 pontiac grand prix base model. I went to 5 different shops and their computer isn't pulling anything up. I went to autozone and their computer said p0300 and to repair fuel injector wiring. I wonder if that will fix the problem or more money.
Thanks for all the info. Everyone My problem turned out to be ignition control module. My redneck approach was with car running. Using pliers pull off coil wire to see if motor changed and spark was present once i found back pack I shut it down and swap with a good pack still had problem and pack fire in new location so replace only ICM and problem solved one part one fix.
