What is this sound? (Start up choke) - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bandit38 · 07-12-2014, 09:49 AM

Quote:

Originally Posted by ChrisBlair

I can't help myself

LOLLOL

That is FUNNY !

My Caroline · 07-12-2014, 11:06 AM

Quote:

Originally Posted by RollaMo

That is what I am hearing too.

Nope, does it when AC is off

My Caroline · 07-12-2014, 11:12 AM

Quote:

Originally Posted by Comrando

Is it set to defog? That can activate the A/C.

Nope.

My Caroline · 07-12-2014, 11:12 AM

http://youtu.be/v8Yy4HHUsBQ

From last night.

Destructo09 · 07-12-2014, 01:02 PM

My guess is right along with these guys, it could be a fuel pressure issue.

Unrelated but kinda similar, my Yamaha FZ1 tends to do this after it's been sitting for awhile after being hot. I'll go hop on and it will start then die a few times before it will stay running.

TheSmokingSuns · 07-13-2014, 07:07 PM

Here is my video of same issue OP is having

My Caroline · 07-13-2014, 10:12 PM

That doesn't explain why it's fine on cold starts.

TheSmokingSuns · 07-13-2014, 10:31 PM

Quote:

Originally Posted by My Caroline

That doesn't explain why it's fine on cold starts.

Yeah I guess we are the only two with this problem and happen to be 2011 models.

TheSmokingSuns · 07-15-2014, 01:39 AM

Here is a video of a POP sound when starting the car. Any people on this helpful forum possibly know what may be the issue??? It sounds pretty bad and does it randomly when car is warm.

Please excuse messy garage. In the middle of cleaning it.

PQ · 07-15-2014, 01:54 AM

Man... sounds like rod knock but obviously is not. A knock that loud would manifest more than that.

I'd say maybe you have a header or exhaust hitting under the car?

But since there is more than one of you I'd say starter?

The audio is great but I can't think of anything. I'm just throwing them out there.

Exhaust headers and back will expand when hot and the motor shakes the most at start up.

Master Shake · 07-22-2014, 04:41 PM

2010 LS, Auto - mine does this as well. Only when warm (but not every time) and never on a cold start (where the engine revs higher for ~10 seconds).

Occasionally, it will make a backfire pop as well -- but it usually just sounds like a single, regular engine knock when it happens. It does not cause the car to stall out or anything, and it runs fine once started.

It generated a code one time, so I took it into the dealer. The code translated to a bad spark plug, which they replaced under warranty. However, the problem still continues every once in a while (never when at the dealer of course!).

My Caroline · 07-23-2014, 10:18 AM

Still hoping for a fix

Phail · 07-23-2014, 10:47 AM

I get the same thing every once and awhile when starting - never even made note of it honestly until this thread - I guess it probably only happens when shes hot.

Why does it matter? The choking doesnt even last for as long asyou turn the key - and it definately doesnt stall or bog out.

RobertRS · 07-23-2014, 11:05 AM

Quote:

Originally Posted by TheSmokingSuns

Here is a video of a POP sound when starting the car. Any people on this helpful forum possibly know what may be the issue??? It sounds pretty bad and does it randomly when car is warm.

Please excuse messy garage. In the middle of cleaning it.

That knock sound seems to only happen while cranking. I'd suspect something to do with the starter. A rod knock would persist beyond cranking. Possible heat soak issue with respect to starter.

07-12-2014, 11:12 AM	#18
My Caroline Drives: Black 2011 Camaro LS Join Date: Feb 2011 Location: Texas Posts: 1,694	http://youtu.be/v8Yy4HHUsBQ From last night. __________________ White Fender Hashes from Big Worm Graphix with Custom White Bowties GM Factory Remote Start and Factory Key Fob SS Fascia, Factory RS HIDs, Plasma P13W fog lights Non-RS to RS and fog light harness by Gen5DIY LED Interior, Trunk, and Licence Plate lights in white ZL1 Spoiler with Gen5DIY harness Factory NPP cat back Blacked out tail light bezels Factory 20 inch wheels wrapped in Nitto Motivos Lowered 1.25inch on Eibach Pro springs

07-12-2014, 01:02 PM	#19
Destructo09 Drives: 2010 CGM Camaro 2SS/LS3 Join Date: Oct 2013 Location: Raleigh-Durham Posts: 1,409	My guess is right along with these guys, it could be a fuel pressure issue. Unrelated but kinda similar, my Yamaha FZ1 tends to do this after it's been sitting for awhile after being hot. I'll go hop on and it will start then die a few times before it will stay running. __________________ 2010 2SS BMR 1" Springs Koni Orange struts/shocks 1LE rear sway bar SRP Racing Pedals Hurst Billet short shifter Square tire/wheel setup Elite Engineering Catch Can Stainless Power longtubes/highflow cats K&N Typhoon CAI RPM Motorsports of Garner, NC dyno tune (421 RWHP)

07-13-2014, 10:12 PM	#21
My Caroline Drives: Black 2011 Camaro LS Join Date: Feb 2011 Location: Texas Posts: 1,694	That doesn't explain why it's fine on cold starts. __________________ White Fender Hashes from Big Worm Graphix with Custom White Bowties GM Factory Remote Start and Factory Key Fob SS Fascia, Factory RS HIDs, Plasma P13W fog lights Non-RS to RS and fog light harness by Gen5DIY LED Interior, Trunk, and Licence Plate lights in white ZL1 Spoiler with Gen5DIY harness Factory NPP cat back Blacked out tail light bezels Factory 20 inch wheels wrapped in Nitto Motivos Lowered 1.25inch on Eibach Pro springs

07-15-2014, 01:54 AM	#24
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	Man... sounds like rod knock but obviously is not. A knock that loud would manifest more than that. I'd say maybe you have a header or exhaust hitting under the car? But since there is more than one of you I'd say starter? The audio is great but I can't think of anything. I'm just throwing them out there. Exhaust headers and back will expand when hot and the motor shakes the most at start up. __________________

07-23-2014, 10:18 AM	#26
My Caroline Drives: Black 2011 Camaro LS Join Date: Feb 2011 Location: Texas Posts: 1,694	Still hoping for a fix __________________ White Fender Hashes from Big Worm Graphix with Custom White Bowties GM Factory Remote Start and Factory Key Fob SS Fascia, Factory RS HIDs, Plasma P13W fog lights Non-RS to RS and fog light harness by Gen5DIY LED Interior, Trunk, and Licence Plate lights in white ZL1 Spoiler with Gen5DIY harness Factory NPP cat back Blacked out tail light bezels Factory 20 inch wheels wrapped in Nitto Motivos Lowered 1.25inch on Eibach Pro springs

07-13-2014, 07:07 PM	#20
TheSmokingSuns Drives: 2017 Camaro 2SS, 2011 Camaro 2LT Join Date: Jan 2014 Location: USA Posts: 640	Here is my video of same issue OP is having

07-15-2014, 01:39 AM	#23
TheSmokingSuns Drives: 2017 Camaro 2SS, 2011 Camaro 2LT Join Date: Jan 2014 Location: USA Posts: 640	Here is a video of a POP sound when starting the car. Any people on this helpful forum possibly know what may be the issue??? It sounds pretty bad and does it randomly when car is warm. Please excuse messy garage. In the middle of cleaning it.

07-22-2014, 04:41 PM	#25
Master Shake Drives: Camaro LS Join Date: Apr 2010 Location: US Posts: 45	2010 LS, Auto - mine does this as well. Only when warm (but not every time) and never on a cold start (where the engine revs higher for ~10 seconds). Occasionally, it will make a backfire pop as well -- but it usually just sounds like a single, regular engine knock when it happens. It does not cause the car to stall out or anything, and it runs fine once started. It generated a code one time, so I took it into the dealer. The code translated to a bad spark plug, which they replaced under warranty. However, the problem still continues every once in a while (never when at the dealer of course!).

07-23-2014, 10:47 AM	#27
Phail Drives: 2011 2LT/RS M6 IOM Join Date: Apr 2011 Location: SK,Canada Posts: 317	I get the same thing every once and awhile when starting - never even made note of it honestly until this thread - I guess it probably only happens when shes hot. Why does it matter? The choking doesnt even last for as long asyou turn the key - and it definately doesnt stall or bog out.