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 migration_chevysucks... Aug 06, 2014 at 08:38 PM about the 2007 Chevrolet Cobalt LS Sedan FWD

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.

144,775

T_S_T answered 10 years ago

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

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migration_chevysucks... answered 10 years ago

yes and it has already been repaired

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144,775

T_S_T answered 10 years ago

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

2 people found this helpful.

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migration_chevysucks... answered 10 years ago

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

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Dan answered 7 years ago

Hey did you figure this out? Have the same thing going on with cylinder 2

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Your Answer:

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? 5 Answers

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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?

5 Answers

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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?

5 Answers

Your Answer:

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