bit of a stutter when idle - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Dr.Manhattan · 08-11-2011, 02:32 PM

First off, loving my 2010 SS, just got it this week, and the things a beast. I generally use my motorcycle for speed, but it's good knowing the car has the juice to get in and out of sticky situations when need be.

Just a question though. I notice when idling in neutral the car has a bit of a stutter too it. Kind of like a strong vibration shaking the car a bit, and figured it's just the normal feeling of the V-8 during idle but wanted to check with the forum to be sure.

Thanks !.

nyrfan · 08-11-2011, 02:34 PM

Quote:

Originally Posted by Dr.Manhattan

First off, loving my 2010 SS, just got it this week, and the things a beast. I generally use my motorcycle for speed, but it's good knowing the car has the juice to get in and out of sticky situations when need be.

Just a question though. I notice when idling in neutral the car has a bit of a stutter too it. Kind of like a strong vibration shaking the car a bit, and figured it's just the normal feeling of the V-8 during idle but wanted to check with the forum to be sure.

Thanks !.

Do you have the A/C on when it does this?

evan · 08-11-2011, 02:37 PM

You could be referring to the rougher idle profile of the cam in the LS3(if yours is an m6) I'm not sure if it is the same for the L99 but i'm going to venture a guess and say yes.

Dave Coyle · 08-11-2011, 02:50 PM

This is normal on the NEW engine and it idles smoother after you get some miles on her.

Nvincent4708 · 08-11-2011, 02:51 PM

If you have the manual with the ls3..this is normal

Dr.Manhattan · 08-11-2011, 02:56 PM

Yea, it is the ls3, manual so I am glad it is not something to do with the engine. Thanks again for the info, very helpful forum.

Jagerday · 08-11-2011, 03:14 PM

I cant believe no body has suggested the old fuse pull. If you just picked it up the dealer probably put 87 octane fuel in it. This will change the tables. I would fill the tank a few times with highest octane possible wherever you are. Than pull fuses 5 & 20 and keep them out overnight. This will reset your tables to high octane fuel. This might be the issue, might not, just my suggestion. But a good rumble out of our big beastly LS3's is normal.

cab2g · 08-11-2011, 03:25 PM

the rumble was one of the first things I noticed when I drove my car home. I thought to myself "now this car has a big engine!!!" Of course, my initial thought was just that there was so much torque even at idle, the engine mounts were shaking. Since then I learned that it has to do with the more aggressive LS3 camshaft and the valve timing causing the engine to "sputter" sort of at idle (but not meant in a negative way, just the valve overlap causes air and gas that has not been burnt to exit into the exhaust causing the rough idle)

Dr.Manhattan · 08-11-2011, 04:03 PM

Quote:

Originally Posted by Jagerday

I cant believe no body has suggested the old fuse pull. If you just picked it up the dealer probably put 87 octane fuel in it. This will change the tables. I would fill the tank a few times with highest octane possible wherever you are. Than pull fuses 5 & 20 and keep them out overnight. This will reset your tables to high octane fuel. This might be the issue, might not, just my suggestion. But a good rumble out of our big beastly LS3's is normal.

I might as well try this as well. When I test drove it, the dealer mentioned he drove the car for a week when they first got in ( bought it used, 5,000 miles ). We were just bouncing questions around and I mentioned the using of premium gas, which to my surprise he said " oh, really ?, never heard of that ". I assume they had been filling it up with regular since they got it.

08-11-2011, 02:32 PM	#1
Dr.Manhattan Drives: Camaro Join Date: Jul 2011 Location: Ontario, Canada Posts: 117	bit of a stutter when idle First off, loving my 2010 SS, just got it this week, and the things a beast. I generally use my motorcycle for speed, but it's good knowing the car has the juice to get in and out of sticky situations when need be. Just a question though. I notice when idling in neutral the car has a bit of a stutter too it. Kind of like a strong vibration shaking the car a bit, and figured it's just the normal feeling of the V-8 during idle but wanted to check with the forum to be sure. Thanks !.

08-11-2011, 02:50 PM	#4
Dave Coyle Drives: 2010 SS , 1970 Z-28, 2002 Avalanche Join Date: Aug 2009 Location: Michigan Posts: 2,524 View My Garage	This is normal on the NEW engine and it idles smoother after you get some miles on her. __________________ IF IT'S WORTH HAVING, IT'S WORTH WAITING FOR!!!! (AND IT WAS) 434RWHP/403RWTQ Livernois Motorsports 2C Cam kit Kooks 1 7/8 LT Headers/Hi-Flo Cats/Corsa Exhaust Roto-Fab CAI / Port Intake Precission 2400/2800 Converter/3.73 AAM gears Livernois Motorsports Tune Best time: 11.97 @ 117 MPH

08-11-2011, 03:25 PM	#8
cab2g love. my. car. Drives: 2011 2SS/RS Join Date: Jul 2009 Location: Chicago Posts: 3,372 View My Garage	the rumble was one of the first things I noticed when I drove my car home. I thought to myself "now this car has a big engine!!!" Of course, my initial thought was just that there was so much torque even at idle, the engine mounts were shaking. Since then I learned that it has to do with the more aggressive LS3 camshaft and the valve timing causing the engine to "sputter" sort of at idle (but not meant in a negative way, just the valve overlap causes air and gas that has not been burnt to exit into the exhaust causing the rough idle) __________________

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08-11-2011, 02:37 PM	#3
evan ready... Drives: 2010 Camaro 2SS/RS Join Date: Apr 2010 Location: Bremerton, WA Posts: 765 View My Garage	You could be referring to the rougher idle profile of the cam in the LS3(if yours is an m6) I'm not sure if it is the same for the L99 but i'm going to venture a guess and say yes.

08-11-2011, 02:51 PM	#5
Nvincent4708 Drives: N/A Join Date: Nov 2010 Location: N/A Posts: 25,856 View My Garage	If you have the manual with the ls3..this is normal

08-11-2011, 02:56 PM	#6
Dr.Manhattan Drives: Camaro Join Date: Jul 2011 Location: Ontario, Canada Posts: 117	Yea, it is the ls3, manual so I am glad it is not something to do with the engine. Thanks again for the info, very helpful forum.

08-11-2011, 03:14 PM	#7
Jagerday Drives: 2010 RJT SS/RS LS3 Join Date: Jul 2011 Location: Grenada, MS Posts: 281 View My Garage	I cant believe no body has suggested the old fuse pull. If you just picked it up the dealer probably put 87 octane fuel in it. This will change the tables. I would fill the tank a few times with highest octane possible wherever you are. Than pull fuses 5 & 20 and keep them out overnight. This will reset your tables to high octane fuel. This might be the issue, might not, just my suggestion. But a good rumble out of our big beastly LS3's is normal.