P0302 Subaru Noise - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 9 (permalink) Old 02-12-2013, 11:34 PM Thread Starter
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Exclamation P0302 Subaru Noise

wel i was driving home from the gas station (didnt get gas just rockstar lol) and as i was leaving at around 15-20mph my cel was flashing and started stumbling on 3 cylinders had everything checked out plugs fine coils fine injectors fine passed compression test and leak down test my mechanic seems to think its the computer but im not too sure btw its a 2006 ss 2.4 auto any ideas or suggestions ?
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post #2 of 9 (permalink) Old 02-14-2013, 03:00 PM Thread Starter
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So no one can help? Lol well it's at the dealer now so I guess ill just post the results of what they say is the problem
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post #3 of 9 (permalink) Old 02-14-2013, 03:11 PM
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Ignition coil pack of course.

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post #4 of 9 (permalink) Old 02-14-2013, 05:02 PM Thread Starter
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2.4 le5 has 4 coil packs one on each cylinder all are fine so what and where is the part you speak of?
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post #5 of 9 (permalink) Old 02-14-2013, 06:11 PM
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My bad, misread that 2.4. You might have just had water in the fuel go through.

---------- Post added at 09:11 PM ---------- Previous post was at 09:09 PM ----------

Those coil are all exactly the same, so for sake of argument interchange 1 and 2 to see if code changes to P0301 if it happens again.

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post #6 of 9 (permalink) Old 02-14-2013, 06:32 PM Thread Starter
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All that has been done everything checks out and te gm only shop says electrical and the dealer now says they believe a valve seat but like I said it has great compression but has anyone ever heard of a running compression test the dealership say that 3 cylinders go up to 90psi rapidly and the problem cylinder reaches only 50psi but very slowly I've never heard of this test and was curious if any of you have?

Last edited by dezertdime06ss; 02-14-2013 at 06:44 PM.
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post #7 of 9 (permalink) Old 02-15-2013, 07:28 AM
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dezertdime06ss,

If you would like for us to check into this further with your dealership, please dont' hesitate to contact me privately with more details (include your name, contact information, and the last 8 digits of your VIN).

Sarah, GM Customer Service

Have you checked into Chevrolet Owner Center? You can maintain service history, check on warranty or recall information, and more. Visit my.chevrolet.com!
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post #8 of 9 (permalink) Old 02-16-2013, 03:31 AM
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Any mis fire that may cause immediate damage to the cat will cause the flashing m.i.l. Its a one trip fault. A damaged valve seat would do it for sure...Any other codes?
It is the only flashing m.i.l code. Either your car has lost fuel/timing control. Or you have a srerios mechanical problem related to the combustion chamber.

Last edited by scagnetti76; 02-16-2013 at 03:44 AM.
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post #9 of 9 (permalink) Old 02-17-2013, 10:52 PM Thread Starter
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Quote:
Originally Posted by scagnetti76 View Post
Any mis fire that may cause immediate damage to the cat will cause the flashing m.i.l. Its a one trip fault. A damaged valve seat would do it for sure...Any other codes?
It is the only flashing m.i.l code. Either your car has lost fuel/timing control. Or you have a srerios mechanical problem related to the combustion chamber.
i got it back from the dealer and they said it was a major mechanical problem but they wanted to rape me on the labor so i took it home to do it myself and when i went to take off the intake manifold boom saw my problem some one left a damn oil soaked rag in there and blocked my intake port for cylinger two it was soo stupid i was with out my car for four days over a damn rag!!! why couldnt they find it? thats what they get paid for right? lol oh well

Last edited by dezertdime06ss; 02-17-2013 at 10:53 PM. Reason: typo
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