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Anonymous
Anonymous asked in Cars & TransportationCar MakesPontiac · 11 months ago

What could be the main cause of a Cylinder 1 misfire on a Pontiac g6 gt?

I have a 97 Pontiac G6 GT and the CEL has been blinking. Took it to Auto Some and they ran it and I got the P0301 code. I have a serious miss in the #1 cylinder. The car has also began to cut off while idle. So far I have had spark plugs/wires changed, as well as the coil pack. I'm having the #1 fuel injector changed today. If that doesn't work, any other suggestions?

5 Answers

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  • 11 months ago

    Replace coils and spark plugs should fix your problem 

  • 11 months ago

    The Ignition Module may be dying. If the easy stuff doesn't work, it's likely that.

  • 11 months ago

    Do a compression test and leak down test.

    Those motors had a problem with the intake manifold leaking coolant. That could cause a misfire but in my opinion when the CEL flashes it's usually electrical.

    Did you put AC Iridium spark plugs i the motor?

    Bosch will cause misfires in GM motors.

    Source(s): Mitsubishi Master Tech
  • 11 months ago

    With the money you already wasted on spark plugs wires & coil you could have paid a qualified mechanic to do a proper diagnosis and pinpoint the problem.

    If your mechanic is suggesting you just randomly fix things without a diagnosis beyond the check engine codes then you should find a better mechanic.

    Gas engines need 4 things to fire properly:

    1. Air

    2. Fuel

    3. Compression

    4. Spark (properly timed)

    If any of those things aren't happening properly you'll have a misfire. Your car's computer doesn't know which part of that equation is missing, only that the cylinder is not firing properly. A decent mechanic would begin checking things like the spark, compression, fuel system etc and pinpoint the problem before telling you to just start replacing things.

  • Anonymous
    11 months ago

    You are "throwing parts", not the correct way to fix cars.  Troubleshoot properly.  Check for a fouled plug.  Check for spark with a spark tester.  Check if the injector is firing and check for injector pulse with a noid light if the injector is not firing.  Check for compression on #1 cylinder. 

    Car is 23 years old. It will be not be a surprise if the #1 cylinder is shot.  Good luck.

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