06 Chevy Cobalt Missfire/Rough idle

Asked by Jul 29, 2013 at 12:44 PM about the 2006 Chevrolet Cobalt LS

Question type: Maintenance & Repair

I Habe A 06 Cobalt, Check Engine Light Is
On. It Has A Very Rough Idle Amd Smoke Is
Coming Out Of Exhaust.. Doesnt Smell Like
Fuel.. I Habe Replaced Spark Plugs, Coil
Pack, Icm, Amd.fuel Filter, Anybody Have
Anyclue On What To.Do Next?? Im Going
Broke On Cash And Patience.. Maybe Even
A Misfire.. Im Lost At This point

7 Answers

9,785

What color smoke?

2 out of 2 people think this is helpful.

White/Gray.. Its Not A Real.Thick Smoke But It Shouldnt Be Doing That.. Car Only Has 45 Thousand Miles On it

ItsLooks LikeWhen You Druve A Car In The Winter Without Letting ItWarm Up All The way

9,785

White smoke is water. Could just be condensation in the exhaust. Could also be a blown head gasket (which would explain the smoke and the rough idle. Are you losing any coolant?

Not Losing Any Fluid And Has Never Gotten Hot..??

9,785

Then it is probably just condensation in the exhaust. Have you run a compression check on the cylinders? Fuel pressure check at the rail? Are you getting a check engine light?

3 out of 3 people think this is helpful.
30

I am not sure but i might have had the same problem with my 2009 cobalt.i changed the camshaft actuator solenoid you have 2 of then on top of block under the cover. 1 is for exhaust 2 is for the intake mime was the intake side car runs like new now and no problems even after 11,000 miles. The parts run around 50 to 60 $

2 out of 2 people think this is helpful.

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