How do you know when a coil pack is going bad on a pontiac sunfire?
July 18, 2009 | Car
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Re: “How do you know when a coil pack is going bad on a pontiac sunfire?”
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The coils usually go bad depending on mileage. I think my coils started crapping out on me at about 50K with my sentra. Best bet, call a local dealer and find out. G’ Luck
I gather you car is a bid older and has a few miles already on it? If I was you if that’s the case I’d try cleaning the coil feed wire connectors and contacts but I think it’s the coil and really you should go to a do it yourself auto wreckers that offers used parts cheap and pick 1 or 2 of those coils up.
Hope that helps and best of luck…….by the way my car showed that same kind of problem once and I changed the coil later another code said the coil wasn’t performing to it’s peak performance capabilities lol….So I changed it back and it worked fine now for ages lol
the check engine light is on, then read the code to find out which cylinder is misfiring and swap that coil to another cylinder and swap the plug to another different cylinder. clear the codes and take the car for a good test drive and check codes again. if it went to the cylinder that the spark plug went to, you know it is the plug thats bad. If it went to the cylinder that the coil went to then tyou can say its the coil. If it stayed at the same cylinder——–cry!$$$$.$$
This technique is for coil-on-plug systems. Did you replace the wires and plugs when you did the tune-up?