Rough Idle? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

thahemp · 03-04-2013, 07:49 PM

Quote:

Originally Posted by litle88

Hemp don't worry bud. It's ok, mine did it since day one in 2010! Even after it got tuned.

Seems like it's more of a decel pop option than anything. From what NC-V and Higgs Boson have suggested, it just requires a little spark timing adjustment to smooth it out.

I do think it sounds cool for a stock config. I just got myself thinking after Jannetty's tests show the intake running lean. The misfire situation is especially suspect. I need to run my OBDII module and see if the ECM is detecting anything funky going on.

thahemp · 03-04-2013, 07:50 PM

Quote:

Originally Posted by blufin

Ok, ok. Mildly aggressive?

:biggrin1:

Haha. To be fair. Historically speaking... It's a fairly agressive cam!

thirdleft152 · 03-04-2013, 07:54 PM

Yeah i think its completely normal. Mine did that from the start, Especially when it was cold. I soon got a muffler delete and it did it a bit more. Bought a SCT tuner and it calmed it down a bit. Recently upgraded to CAI, Headers, full exhaust and performance tune, and it hasn't been until now that it went away.

3rdgen3 · 03-04-2013, 10:39 PM

My 2012 does it also.

From my understanding, all LS3 cars do it and L99 cars do not.

It has to be because of the camshaft. It's not "aggressive" but for a stock cam, i guess it is? lol

bw26ss · 03-04-2013, 10:43 PM

i have l99 and it does it

litle88 · 03-04-2013, 10:52 PM

^^ here too ^^

slick rick · 03-04-2013, 11:13 PM

Looks normal to me

BlackNYellowLs3 · 04-13-2013, 11:18 PM

My 2010 now has 23000km with cat back and k&n and has done it since i bought it with 5000km

My ls3 has done it since the day i got it, i had a buddy who is a tech look it up on some database and he found a document that GM posted saying that the LS3 and L99s have a bit of a "idle loap"

The GM testing procedure says to compare the problem vehicle side by side to a new one on the lot and if it is worse than the new vehicle to "repair accordingly"

I actually just took mine in because i wanted to be sure all was good before i do my cam.

Other than the poor attitude of the service manager all was good to go.

so i guess the best answer is the most common one i have been gettin...

"they just do that"

hapisok · 04-14-2013, 06:21 AM

is that dip caused by an accessory kicking on? like the fan, it has both low and high speeds. if you watch the RPM's when the AC comes on it'll do the same thing. and if you are hearing a squeak when it dips...then it sounds mechanical. but for the RPM's to hunt a little at idle, mine did the same thing.

bombgolf · 04-14-2013, 07:11 AM

My wife and I have the L99 in our his and hers '12s. Mine does that; hers does not.

I struggle to believe it's the "aggressive cam". Mine feels like miss, not at all like a lopey cam... My '66 Chevelle with the big block has the cam and lopes, this does not feel or behave the same. By the way, love tuning and working on the 66, no computer required...

What's the issue with the torque management piece mentioned above and how can that contribute to the issue?

Chevrolet Customer Svc · 04-14-2013, 11:44 AM

If anyone wants to get their vehicle in to a GM dealer for an official diagnosis, please let me know. I'd like to help monitor what issues you're experiencing and document the case in our system.

All the best,

William R.
Chevrolet Customer Care

goshawk823 · 04-14-2013, 09:25 PM

I have a 2013 L99 and mine's done it since I bought it. I brought it in to my dealer and had it checked, just to make sure nothing was about to fail on it. It checked out fine, according to whatever checks they did on the car.

thirdleft152 · 04-15-2013, 11:26 AM

its gotta be an aggressive tune/cam, nothing wrong with the car.

03-04-2013, 07:54 PM	#17
thirdleft152 Drives: 2013 2SS/RS LS3 - Summit White Join Date: Sep 2012 Location: Dallas, Tx Posts: 117	Yeah i think its completely normal. Mine did that from the start, Especially when it was cold. I soon got a muffler delete and it did it a bit more. Bought a SCT tuner and it calmed it down a bit. Recently upgraded to CAI, Headers, full exhaust and performance tune, and it hasn't been until now that it went away. __________________ ADM Race CAI - SW LT - SW Retro Chambered 3" - EE Catch ADM Tuned - 412RWHP/406RWTQ

03-04-2013, 10:39 PM	#18
3rdgen3 10-bolt Destroyer Drives: 2012 Camaro 2SS/RS - AGM, LS3/6M Join Date: Jun 2012 Location: Canukistan Posts: 860	My 2012 does it also. From my understanding, all LS3 cars do it and L99 cars do not. It has to be because of the camshaft. It's not "aggressive" but for a stock cam, i guess it is? lol __________________ 2012 Camaro 2SS/RS - LS3/TR6060: Cam, Headers, Exhaust, Intake, Gears, Twin Disk, Suspension, Tuned - 475rwhp, 443rwtq

03-04-2013, 10:52 PM	#20
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	^^ here too ^^ __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

03-04-2013, 11:13 PM	#21
slick rick SoCal Mayhem Drives: 2010 Camaro 1SS/RS Join Date: Aug 2008 Location: Foothill Ranch, CA Posts: 5,488 View My Garage	Looks normal to me __________________

04-13-2013, 11:18 PM	#22
BlackNYellowLs3 mmmm..... displacement :) Drives: 2010 Black n' Yellow LS3 Join Date: Apr 2013 Location: Sylvan Lake AB Posts: 12	My 2010 now has 23000km with cat back and k&n and has done it since i bought it with 5000km My ls3 has done it since the day i got it, i had a buddy who is a tech look it up on some database and he found a document that GM posted saying that the LS3 and L99s have a bit of a "idle loap" The GM testing procedure says to compare the problem vehicle side by side to a new one on the lot and if it is worse than the new vehicle to "repair accordingly" I actually just took mine in because i wanted to be sure all was good before i do my cam. Other than the poor attitude of the service manager all was good to go. so i guess the best answer is the most common one i have been gettin... "they just do that" Last edited by BlackNYellowLs3; 04-13-2013 at 11:21 PM. Reason: forgot to enter part of a sentance

03-04-2013, 10:43 PM	#19
bw26ss Banned Drives: ss camaro Join Date: Jul 2012 Location: usa Posts: 876	i have l99 and it does it

04-14-2013, 06:21 AM	#23
hapisok crazier than a coconut Drives: 2010 2SS/RS LS3 Join Date: Jul 2010 Location: virginia Posts: 1,547	is that dip caused by an accessory kicking on? like the fan, it has both low and high speeds. if you watch the RPM's when the AC comes on it'll do the same thing. and if you are hearing a squeak when it dips...then it sounds mechanical. but for the RPM's to hunt a little at idle, mine did the same thing. __________________

04-14-2013, 07:11 AM	#24
bombgolf Drives: 45th Anniv 2SS/RS Convertible Join Date: Aug 2012 Location: Florida Posts: 63	My wife and I have the L99 in our his and hers '12s. Mine does that; hers does not. I struggle to believe it's the "aggressive cam". Mine feels like miss, not at all like a lopey cam... My '66 Chevelle with the big block has the cam and lopes, this does not feel or behave the same. By the way, love tuning and working on the 66, no computer required... What's the issue with the torque management piece mentioned above and how can that contribute to the issue?

04-14-2013, 11:44 AM	#25
Chevrolet Customer Svc Drives: GM Vehicles Join Date: Jun 2010 Location: Michigan Posts: 9,328	If anyone wants to get their vehicle in to a GM dealer for an official diagnosis, please let me know. I'd like to help monitor what issues you're experiencing and document the case in our system. All the best, William R. Chevrolet Customer Care __________________ For information on the GM Privacy Statement, please visit http://www.gm.com/privacy-statement.html

04-14-2013, 09:25 PM	#26
goshawk823 Drives: 2017 RS convertible Join Date: May 2009 Location: New Kent, Virginia Posts: 837	I have a 2013 L99 and mine's done it since I bought it. I brought it in to my dealer and had it checked, just to make sure nothing was about to fail on it. It checked out fine, according to whatever checks they did on the car. __________________ Camaros I've owned: 1969 RS/SS Z10 Indy Pace Car - Hardtop 1 of 250 1970 Camaro 2010 2LT RS 2013 2SS RS Current ride: 2017 Camaro 2LT RS convertible

04-15-2013, 11:26 AM	#27
thirdleft152 Drives: 2013 2SS/RS LS3 - Summit White Join Date: Sep 2012 Location: Dallas, Tx Posts: 117	its gotta be an aggressive tune/cam, nothing wrong with the car. __________________ ADM Race CAI - SW LT - SW Retro Chambered 3" - EE Catch ADM Tuned - 412RWHP/406RWTQ