Rough Idle & Misfire Issues - Pontiac G6 Forum
 
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post #1 of 14 (permalink) Old 06-13-2012, 07:55 AM Thread Starter
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Rough Idle & Misfire Issues

Started about 2 months ago, experiencing rough, jumpy idle when in park or at a stop. It slowly progressed to a hard misfire when driving, usually occurs at 1st gear. All spark plugs have been changed, fuel injection system was cleaned and #1 & 4 ignition coils have been replaced. The rough idle is better, but not 100% gone. The misfires went away briefly and are now back too complete with engine light on. I'm going after work to get another reading from AutoZone. My mechanic wants to replace the other 2 ignition coils. I'm at my wits end not to mention stressed because my inspection is coming up in July! Any suggestions out there?
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post #2 of 14 (permalink) Old 06-13-2012, 11:56 AM
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replaced:

all spark plugs
1 & 4 coils


Details needed:

Exactly which codes has it popped in the last 6 months? (exact code numbers)

Mileage?

What model year?

Sounds like you have the 2.4l. Correct?

Your mechanic is either an idiot or just plain dishonest. The odds of two coils (let alone four) failing simultaneously is about as close to zero as you can get. He's just throwing parts at it & separating you from your money. I'd advise you to drop him.



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post #3 of 14 (permalink) Old 06-13-2012, 12:15 PM Thread Starter
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I don't have the codes with me; going to get another one run tonight. Mileage is 83,000 and yes it's a 2.4L.

I worried about that as well...he's a close friend of the family which is why I haven't dropped him yet.

I don't think the wires were changed when the plugs were. Do you think that might be part of the problem?
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post #4 of 14 (permalink) Old 06-13-2012, 12:29 PM Thread Starter
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And thank you SO much for the reply; it's very appreciated! I decided to do research on my own because while I haven't had any issues with my mechanic thus far, I'm surprised that this has him so stumped.

I will be back with code numbers after 5:00.
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post #5 of 14 (permalink) Old 06-13-2012, 12:55 PM
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Quote:
Originally Posted by 06Skye View Post
I don't have the codes with me; going to get another one run tonight. Mileage is 83,000 and yes it's a 2.4L.

I worried about that as well...he's a close friend of the family which is why I haven't dropped him yet.

I don't think the wires were changed when the plugs were. Do you think that might be part of the problem?
Wires are easy to test. So are coils & plugs. No professional should be throwing parts at a problem hoping something sticks.



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post #6 of 14 (permalink) Old 06-13-2012, 01:34 PM Thread Starter
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You're right of course; it's hard to find a trustworthy mechanic when you don't know the first thing about what they're talking about. I might have to bite the bullet on it n let him go. More this evening, thanks again!
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post #7 of 14 (permalink) Old 06-13-2012, 05:47 PM Thread Starter
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Code: P0014 - he said most likely a camshaft issue, possible timing chain. Sound right to u greenman?
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post #8 of 14 (permalink) Old 06-13-2012, 08:09 PM
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Take any advice you get from an autozone clerk with a large dose of skepticism.

0014 on a 2.4l:
This is usually (almost always) caused by a bad exhaust CMP actuator solenoid (or occasionally a broken wire to it) . Please search in this forum on "P0014" (I counted 13 threads on the subject already) & read those threads first & come back with any questions. This part is 100% covered under the powertrain warranty for an '07-'10. It is an extremely easy part to replace on the ecotec & is not expensive.

And your "mechanic" wanted to replace more ignition coils? That's just scary.



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post #9 of 14 (permalink) Old 06-14-2012, 07:56 AM Thread Starter
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Will do, thank you so much. I have an '06 so no warranty coverage for me but glad to see that it's inexpensive. I'm on the hunt for a different mechanic now.
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post #10 of 14 (permalink) Old 06-15-2012, 02:31 PM Thread Starter
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greenman: i'm confused! See the attached picture for the camshaft position actuator solenoid valve connector; would I be replacing the item pointing to in red or blue?
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post #11 of 14 (permalink) Old 06-15-2012, 02:34 PM Thread Starter
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Is this the connector (clip) and the one with the bolt is the solenoid?
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post #12 of 14 (permalink) Old 06-15-2012, 03:29 PM
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Quote:
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greenman: i'm confused! See the attached picture for the camshaft position actuator solenoid valve connector; would I be replacing the item pointing to in red or blue?
I would just replace both solenoids as they are a problematic part & if one is failing the other will soon enough. They have different part numbers & the connectors are keyed to prevent installing them backwards.



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post #13 of 14 (permalink) Old 06-15-2012, 03:33 PM
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Quote:
Originally Posted by 06Skye View Post
Is this the connector (clip) and the one with the bolt is the solenoid?
Correct. Also, make sure the wires are not broken off the connector.



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post #14 of 14 (permalink) Old 06-15-2012, 07:15 PM Thread Starter
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Thanks! I was looking for the wrong part the whole time but I got it now, on the right track. I'll be back in touch.
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