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Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Car
Satisfied Customers: 48680
Experience:  16 years of experience
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Oldsmobile Alero: Have a 2003 Olds Alero 2.4L 6 cylinder.

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Have a 2003 Olds Alero 2.4L 6 cylinder. It has a misfire, rough idle, and generally runs rough (whole car vibrates while driving). We have changed the plugs and all the coils. The misfire is not as bad, but still there (especially noticable when reversing). What else is a possibility? The ignition control module has been suggested, but I don't want to replace parts I don't need to.

Hello I'm Chris. Thanks for visiting Just Answer.


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Customer: replied 4 years ago.

No, I have not gotten any information regarding my car problem. We are going to try the ignition control module today and see if that fixes it. Also possibly the MAF.

Is the car showing any warning lights or storing any codes?

Is this misfire occurring all the time even at idle under when brake torquing or when just in gear not moving?



Customer: replied 4 years ago.

Replaced the ignition control module, plug wires, and MAF sensor today. Still has a misfire...two tire sensor codes and a cylinder 3 misfire code. The misfire occurs constantly, when idling and driving.

Since it is occurring at all the time, if you unplug #3 coil wire or injector does it run the same or worse?


Customer: replied 4 years ago.

The difference at all. We replaced all the coils, wires, and plugs.

The next steps will be to verify this plug is getting good spark then do a cylinder compression test on that head then check the injector to see if its pulsing with a noid light. If there is no pulse then its a wiring or computer issue. If there is pulse then replace the faulty injector.


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