Hesitation on cold starts? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Captain McFunk · 04-28-2010, 12:35 AM

Hey guys, my L99 SS has about 400 miles on it or so. It seems like when i first get in my car for the day, I'll sit in the garage with the car started for about 30 seconds or so, and when I finally put it into drive (after reversing out of the garage) and start giving it gas, it hesitates about every half second for the first 2 or 3 streets I drive down. By the time I get out of my neighborhood, it's not doing it anymore. Is this a common problem, or anything in specific anyone knows of?

Thanks!

Adam

CLEAN · 04-28-2010, 09:51 AM

Mine does it too, just cold I guess.

Heliwrench · 04-28-2010, 10:16 AM

Haha i was driving to work this morning thinking the same thing!

Russell James · 04-28-2010, 10:19 AM

You may want to try the fuse pull thing on the L99, just to make sure it's running on the high octane table.

More than once, a dealer has put 87 octane in a new car and that triggers it to run off the low octane table.... and some L99s have a tendency to stay on that table for a while, doing the fuse pull corrects that.

If it is very slight and hardly noticeable, maybe the nature of the beast. My LS3 is slightly jerky when stone cold too. Just a bit cold blooded I guess.

Romeloc · 04-28-2010, 10:32 AM

maybe afm active fuel management

Iwantone2 · 04-28-2010, 10:42 AM

I would say that it is "common" on the L99 cars. Mine now has 13K miles on it and I don't feel the hesitation any more. As posted above, you should definitely try the fuse pull.

*mlee* · 04-28-2010, 10:42 AM

Mine always did that too until I got it tuned.... just put my original tune back on and it's doing it again (16k miles)...

Tried the dealer once and after a bunch of updates no fix...

CLEAN · 04-28-2010, 12:44 PM

Quote:

Originally Posted by Russell James

You may want to try the fuse pull thing on the L99, just to make sure it's running on the high octane table.

I've done the pull before just to do it, but I think this particular thing is just the stock tune running rich at start up.

Quote:

Originally Posted by Romeloc

maybe afm active fuel management

Nah, it's the tune, it does it putting it in reverse to back out of the garage, no AFM at that stage.

But speaking of AFM, I'm seriously getting mine turned off, it's way too intrusive, and too abrupt when it cycles back to 8. On our old Impala SS and current G8 GT, you could never sense it going back and forth, but this one is quite annoying. AFM...

Jason@JacFab · 04-28-2010, 01:31 PM

My LS3 car does it too... Seems a lot of people have this problem, and sounds like there is no fix. My 04 GTO never did it :(

04-28-2010, 12:35 AM	#1
Captain McFunk Break Necks, Cash Checks Drives: 2010 black Camaro 2SS/RS Join Date: Apr 2010 Location: Little Rock, AR Posts: 701 View My Garage	Hesitation on cold starts? Hey guys, my L99 SS has about 400 miles on it or so. It seems like when i first get in my car for the day, I'll sit in the garage with the car started for about 30 seconds or so, and when I finally put it into drive (after reversing out of the garage) and start giving it gas, it hesitates about every half second for the first 2 or 3 streets I drive down. By the time I get out of my neighborhood, it's not doing it anymore. Is this a common problem, or anything in specific anyone knows of? Thanks! Adam __________________ 2009 CTS-V - White Diamond - intake, exhaust, wheels, visual mods

04-28-2010, 09:51 AM	#2
CLEAN Drives: '19 Stingray '22 MB GLC 300 Join Date: Jan 2009 Location: Fort Worth, TX Posts: 447	Mine does it too, just cold I guess. __________________ "Ever since we got the Camaro, everything seems better" -My 6 year old daughter

04-28-2010, 10:32 AM	#5
Romeloc Drives: 2010 Black 2SS RS A6 Inferno Join Date: Nov 2009 Location: Maryland Posts: 1,160	maybe afm active fuel management __________________ [SIGPIC][/SIGPIC]2010 Camaro Black 2SS/RS A6 Inferno Interior Polished Rims, Sunroof Born 11/19/09 mods: 20% tints Borla Atak cat-bak Roto-Fab intake amber footwell, dome, and trunk lighting(AAC) Decepticon Gas door Led Taillights (technostalgia)

04-28-2010, 10:42 AM	#6
Iwantone2 Voice Of The Voiceless Drives: CGM 1SS RS Join Date: Feb 2009 Location: OC Cali Posts: 9,610 View My Garage	I would say that it is "common" on the L99 cars. Mine now has 13K miles on it and I don't feel the hesitation any more. As posted above, you should definitely try the fuse pull. __________________

04-28-2010, 10:42 AM	#7
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,969 View My Garage	Mine always did that too until I got it tuned.... just put my original tune back on and it's doing it again (16k miles)... Tried the dealer once and after a bunch of updates no fix... __________________

04-28-2010, 10:16 AM	#3
Heliwrench Drives: 2010 Black 1SS Join Date: Aug 2009 Location: Langley BC Posts: 666	Haha i was driving to work this morning thinking the same thing!

04-28-2010, 10:19 AM	#4
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	You may want to try the fuse pull thing on the L99, just to make sure it's running on the high octane table. More than once, a dealer has put 87 octane in a new car and that triggers it to run off the low octane table.... and some L99s have a tendency to stay on that table for a while, doing the fuse pull corrects that. If it is very slight and hardly noticeable, maybe the nature of the beast. My LS3 is slightly jerky when stone cold too. Just a bit cold blooded I guess.

04-28-2010, 01:31 PM	#9
Jason@JacFab Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008 Location: Central Point, OR Posts: 5,685 View My Garage	My LS3 car does it too... Seems a lot of people have this problem, and sounds like there is no fix. My 04 GTO never did it :(

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