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Old 04-11-2013, 03:13 PM   #1
bombgolf
 
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Rough idle Help

My Auto 2SS seems to have a very rough idle. This happens in park and in drive at a stop. Has anyone else had this issue? Any suggestions?
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Old 04-11-2013, 03:15 PM   #2
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yes, and i have been told it is normal, mine is very rough at first start up
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Old 04-11-2013, 03:32 PM   #3
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Originally Posted by 11fastss View Post
yes, and i have been told it is normal, mine is very rough at first start up
I am assuming that yours stops after warming up? Either way, That doesn't sound very normal...

Mine continues... Even after warm... Doesn't seem normal... Any thoughts or suggestions?
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Old 04-11-2013, 06:35 PM   #4
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My new SS auto also seems to do this. Quite often during start up and sometimes later when it should have already been warmed up.
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Old 04-11-2013, 10:42 PM   #5
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Any ideas? My '66 Chevelle Conv with the big block and a simple HEI ignition doesn't idle this rough, feels like a miss... I don't have a CEL but can't believe this is "normal"...
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Old 04-16-2013, 07:24 PM   #6
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To follow up, we took the wife's '12 SS auto vert on a road trip (1200) miles this last week and hers does not idle rough nor does it surge and lunge under normal highway driving, as mine does... Any suggestions?
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Old 04-16-2013, 08:11 PM   #7
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did your wife secretly put a cam in there? lol
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Old 04-16-2013, 09:04 PM   #8
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LOL...I wish it was a cam... If this were my 66 Chevelle, I would say it's a miss but with all the electronics and computers on the new cars, i am reluctant to muck around with anything...

While I didn't buy the car for fuel efficiency, hers also gets 3-5 mpg more than mine...
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Old 04-17-2013, 05:14 AM   #9
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Quote:
Originally Posted by bombgolf View Post
LOL...I wish it was a cam... If this were my 66 Chevelle, I would say it's a miss but with all the electronics and computers on the new cars, i am reluctant to muck around with anything...

While I didn't buy the car for fuel efficiency, hers also gets 3-5 mpg more than mine...
I'm in the same boat at the moment, just finished new engine build & now have idle issue where it surges or stalls in gear just after engine has warmed up but oil still showing cold, once engine oil warmed up issue virtually disappears. It never use to do this so for me it's not normal. I pulled MAF sensor & sprayed MAF cleaner on it, this has reduced some of it, but after searching forums I'm going to try alot of di-electric grease on leads on spark plug ends, some mechanics say this stuff is a must for these camaro's to have clean idle. If that don't work I'm going searching for very small air leak that must go away on heat expansion.
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Old 04-17-2013, 02:57 PM   #10
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I have the same rough idle issue. I have the L99 and assumed this was just the AFM?
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Old 04-17-2013, 05:56 PM   #11
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Hello bombgolf,

I would suggest getting your vehicle in to see a dealer for an official diagnosis of this situation. We will then have a better idea if there is a actual issue and also have it documented for future references. If you decided to take it in, I can help set that visit up for you. Let us know, here to help.

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Old 04-18-2013, 02:23 PM   #12
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Originally Posted by Bpw72 View Post
I have the same rough idle issue. I have the L99 and assumed this was just the AFM?
I had been told by many that it was AFM but the wife's '12 auto SS doesn't have any of these symptoms, nor does hers lunge and surge during normal driving on the freeway....
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Old 04-18-2013, 04:24 PM   #13
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Is the rough idle new or has it always been this way?

How many miles?

If you put it in park does the rough idle diminish? Does it go away?
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Old 04-19-2013, 08:15 PM   #14
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Originally Posted by intensifi View Post
Is the rough idle new or has it always been this way?

How many miles?

If you put it in park does the rough idle diminish? Does it go away?
It has probably done it all along but has become more noticeable... The car has about 4500 miles and no, it doesn't go away...

I took it to the dealer today, great service from my dealer by the way... I had a bad O2 sensor (but no CEL) and they think a bad torque converter... Have to take it back next week...
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Old 05-17-2013, 01:39 PM   #15
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rough idle

Quote:
Originally Posted by bombgolf View Post
My Auto 2SS seems to have a very rough idle. This happens in park and in drive at a stop. Has anyone else had this issue? Any suggestions?
Took my less than a month old Manual 2SS to the dealership for rough idle and first oil change. They checked it for codes and said that it was normal. They even when to another manual 2SS in the inventory to see if it felt the same. The car really shakes when idling at a stop light. Other than that, she runs fine.
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Old 06-13-2013, 08:55 PM   #16
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I have a 2011 SS auto with 25,000 miles on it and it idles rough all the time. While going down the road, I can't feel it and I don't have a surge, but it definitely doesn't go away and does it at a stop light or any idle. I took it to the dealership and they dug around for 2 days and finally found a 'bulletin' that says that a rough idle is 'normal.'

I am really having a tough time believing that - my '68 doesn't idle this rough and it has a decent cam in it! I am OCD about how it runs too, doesn't seem right that this would be considered 'normal' by the dealership. I told them I wanted it noted so if I have a problem in the future, it's documented that I brought it in.

I have done NOTHING to my car - 100% stock and today I started it at work and the idle seemed rougher than ever. :(

This can't REALLY be normal can it!?
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Old 06-14-2013, 09:42 AM   #17
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Quote:
Originally Posted by schoen311 View Post
I have a 2011 SS auto with 25,000 miles on it and it idles rough all the time. While going down the road, I can't feel it and I don't have a surge, but it definitely doesn't go away and does it at a stop light or any idle. I took it to the dealership and they dug around for 2 days and finally found a 'bulletin' that says that a rough idle is 'normal.'

I am really having a tough time believing that - my '68 doesn't idle this rough and it has a decent cam in it! I am OCD about how it runs too, doesn't seem right that this would be considered 'normal' by the dealership. I told them I wanted it noted so if I have a problem in the future, it's documented that I brought it in.

I have done NOTHING to my car - 100% stock and today I started it at work and the idle seemed rougher than ever. :(

This can't REALLY be normal can it!?
Hello schoen311,

Sorry you seem to be having some rough idling issues. I can help document your issue as well. Could you private message me your VIN, accurate mileage, full name, address and contact number?

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Old 06-14-2013, 04:06 PM   #18
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When I had an upper induction cleaning done before my catch can install the idle smoothed out quite a bit.
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Old 06-18-2013, 12:27 PM   #19
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There is a very well documented issue with the MAF - search for "weak MAF" and you will find many posts on it. Here is one that also has links to how the issue was initially discovered and easily remedied:

http://www.camaro5.com/forums/showthread.php?t=195581

Basically, pull the negative battery connection, pull the MAF (careful not to touch the sensor areas) and see what code is on the MAF. See the above link for details.

I had the exact same issues described in this thread and they were immediately corrected with a "Strong" MAF replacement
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Old 09-18-2013, 05:33 AM   #20
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Quote:
Originally Posted by HarryNW View Post
There is a very well documented issue with the MAF - search for "weak MAF" and you will find many posts on it. Here is one that also has links to how the issue was initially discovered and easily remedied:

http://www.camaro5.com/forums/showthread.php?t=195581

Basically, pull the negative battery connection, pull the MAF (careful not to touch the sensor areas) and see what code is on the MAF. See the above link for details.

I had the exact same issues described in this thread and they were immediately corrected with a "Strong" MAF replacement
I've noticed a rough idle also just recently on M6 and it has a strong MAF... Now I wondering if I touched it while checking the part code... I was thinking I may have gotten some bad gas on the last fill up. Looks like I need to clean the MAF and watch this.

What is used to properly clean the MAF??
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Old 09-18-2013, 05:42 AM   #21
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I've noticed a rough idle also just recently on M6 and it has a strong MAF... Now I wondering if I touched it while checking the part code... I was thinking I may have gotten some bad gas on the last fill up. Looks like I need to clean the MAF and watch this.

What is used to properly clean the MAF??
Mass air flow cleaner! Safe on electronics!
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Old 09-18-2013, 09:24 AM   #22
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Mass air flow cleaner! Safe on electronics!

Thanks!
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