L99 cold start rough idle. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2010 Bumblebee · 06-25-2010, 08:00 AM

Hi,

Has anyone noticed any rought idle during a cold start for the L99? I usually use remote start and let the car warm up so I'm not sure if this is normal, but it sure didn't feel normal today. I got in my car and started it up this morning, put my hands on the steering wheel and the car started to shake. It shook pretty good like a skip. I could feel it in the steering, on the seat and see the car shaking for about a minute and then it faded away. Yesturday I drove thru some really heavy rain storms, but drove about 120 miles after that before parking it in the garage. I wonder if it was water on a coil pack or in the wires.. What do you think?

Everest · 06-25-2010, 08:52 AM

My car does this sometimes as well. I start it in the garage and throw it in reverse, as I'm backing out it's starts to shake. By the time I'm out of the garage it's usually over.

Dakota Kid · 06-25-2010, 08:57 AM

Quote:

Originally Posted by Everest

My car does this sometimes as well. I start it in the garage and throw it in reverse, as I'm backing out it's starts to shake. By the time I'm out of the garage it's usually over.

Same here.

kentf · 06-25-2010, 09:32 AM

I have the same thing on start up. I think the engine is just cold natured. After 30 seconds it starts to idle without shake. Nothing to worry about.

04Ram2500Hemi · 06-25-2010, 09:43 AM

Like the others said, it's normal for this engine. By the time I get out of my garage and down to the main street (a block at the most) it's all good.

racrx451 · 06-25-2010, 09:45 AM

Quote:

Originally Posted by Everest

My car does this sometimes as well. I start it in the garage and throw it in reverse, as I'm backing out it's starts to shake. By the time I'm out of the garage it's usually over.

i get this too.. i think the stock tune gives it too much fuel. need to get my predator on this thing. I will let you know if it changes that.

HDDAN · 06-25-2010, 11:11 AM

Quote:

Originally Posted by racrx451

i get this too.. i think the stock tune gives it too much fuel. need to get my predator on this thing. I will let you know if it changes that.

Ditto. I do not know if the AFM is working at idle or not. Does anyone?

jtzako · 06-25-2010, 11:14 AM

Mine does this also. I usually let the RPMs settle (10-15 seconds after start) before I go into gear to avoid the jumpyness.

green man · 06-25-2010, 11:16 AM

My LS3 is cold blooded, drives like hell for the first mile or so every morning...afraid of what's going to happen when the mornings are actually cold.

Everest · 06-25-2010, 11:51 AM

jtzako, I usually do the same now.

HDDAN · 06-25-2010, 11:55 AM

Quote:

Originally Posted by jtzako

Mine does this also. I usually let the RPMs settle (10-15 seconds after start) before I go into gear to avoid the jumpyness.

Me also. When first started, it runs at about 1100 rpm and goes into gear hard. I let it run until the revs drop to about 750 before shifting.

Revo1 · 06-25-2010, 01:53 PM

My LS1 does this from time to time. It always idles kinda rough tho

06-25-2010, 08:00 AM	#1
2010 Bumblebee Drives: Transformers Edition Camaro 2SS/RS Join Date: Jan 2010 Location: Mass Posts: 1,048 View My Garage	L99 cold start rough idle. Hi, Has anyone noticed any rought idle during a cold start for the L99? I usually use remote start and let the car warm up so I'm not sure if this is normal, but it sure didn't feel normal today. I got in my car and started it up this morning, put my hands on the steering wheel and the car started to shake. It shook pretty good like a skip. I could feel it in the steering, on the seat and see the car shaking for about a minute and then it faded away. Yesturday I drove thru some really heavy rain storms, but drove about 120 miles after that before parking it in the garage. I wonder if it was water on a coil pack or in the wires.. What do you think? __________________ The Yellow Camaro Club http://www.camaro5.com/forums/group.php?groupid=128 Northern Massachusetts & Southern New Hampshire Camaro Club http://www.camaro5.com/forums/group.php?groupid=127 The mother of all supercharger questions thread http://www.camaro5.com/forums/showthread.php?t=77958 My 2010 Camaro Review http://www.camaro5.com/forums/showthread.php?p=2025442#post2025442 2010 Transformer Edition Camaro L99 Auto

06-25-2010, 11:14 AM	#8
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	Mine does this also. I usually let the RPMs settle (10-15 seconds after start) before I go into gear to avoid the jumpyness. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

06-25-2010, 11:16 AM	#9
green man Drives: 1SS/RS M6 Join Date: May 2010 Location: Illinois Posts: 198	My LS3 is cold blooded, drives like hell for the first mile or so every morning...afraid of what's going to happen when the mornings are actually cold. __________________ Gripping the wheel, his knuckles went white with desire! The wheels of his Camaro exploding on the highway like a slug from a .45. True death: 426 horsepower of maximum performance piercing the night... This is black sunshine.

06-25-2010, 01:53 PM	#12
Revo1 Don't Like it? Suggit. Drives: 2010 2SS/RS Join Date: Aug 2008 Location: Fresno, CA Posts: 14,832 View My Garage	My LS1 does this from time to time. It always idles kinda rough tho __________________ "Tops off, tach up baby- loud and proud!" A Camaro lover from day one- 1996 3.8 V6 Camaro, to 1996 5.7 LT1 Camaro Z28, to the sold 2002 5.7 LS1 Camaro SS, and NOW, a [I]6.2 L99 VR 2SS/RS: XS Power stainless full exhaust, Airaid CAI, BMR drop springs and sways, custom tune by Cal Speed- 411rwhp

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06-25-2010, 08:52 AM	#2
Everest Drives: 2SS/RS L99 Rally Yellow Sun Roof Join Date: Apr 2010 Location: Alberta, Canada Posts: 197 View My Garage	My car does this sometimes as well. I start it in the garage and throw it in reverse, as I'm backing out it's starts to shake. By the time I'm out of the garage it's usually over.

06-25-2010, 09:32 AM	#4
kentf Drives: 2010 camaro Black/White Stripes SS Join Date: Jan 2010 Location: Conyers, Ga Posts: 81	I have the same thing on start up. I think the engine is just cold natured. After 30 seconds it starts to idle without shake. Nothing to worry about.

06-25-2010, 09:43 AM	#5
04Ram2500Hemi Drives: 04 Ram 2500 & 2010 Camaro 2SS/RS Join Date: Feb 2010 Location: Missoula, Montana Posts: 1,301	Like the others said, it's normal for this engine. By the time I get out of my garage and down to the main street (a block at the most) it's all good.

06-25-2010, 11:51 AM	#10
Everest Drives: 2SS/RS L99 Rally Yellow Sun Roof Join Date: Apr 2010 Location: Alberta, Canada Posts: 197 View My Garage	jtzako, I usually do the same now.