I have a p0304 code which indicates misfire on cylinder 4. The car seems 2 shake once in awhile and fuel economy has gone down significantly. I already changed the coils for cylinder 3 and 4 but still no luck. Can anyone help on how I could fix this?

Asked by Aug 06, 2014 at 08:38 PM about the 2007 Chevrolet Cobalt LS

Question type: Maintenance & Repair

p0304 code, low fuel economy now, car starts to shake at times, and check engine light
is still on after replacing coil for cylinder 4 and 3 and reset.

4 Answers


Is your car up for recall on your igintion switch?And if so has it been repaired?

yes and it has already been repaired

1 out of 1 people think this is helpful.

If 1 and 2 are getting fire,may be bad crank sensor or your ECM.

1 out of 1 people think this is helpful.

I also have a error code that indicates a lean to rich sensor threshold fail

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