07-11-2014, 12:19 AM | #1 | ||
Drives: Black 2011 Camaro LS Join Date: Feb 2011
Location: Texas
Posts: 1,694
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What is this sound? (Start up choke)
SOLUTION
Well y'all, she's back. And I have an answer. As it turns out, the choke on the start up was caused by "excessive carbon build up" on the throttle body. The tech took apart, cleaned, reassembled and relearned the idle. THIS LAST STEP IS IMPORTANT. Over time the carbon on the throttle body caused the throttle to relearn a new position. NOW, normally I would say this all sounds like bull.... But it worked. And its only crazy if it doesn't work. I have been driving the car for a week now just to be sure before I posted, and so far, i have not had one start up issue. On to the cause of the build up... bad gas quality. Now, due to no fault of mine, all the gas where i was out at school was crap gas. I had no choices. Now that I have transferred schools, I am able to get the good stuff. Good Luck to anybody else experiencing the issue. Maybe you can tell your dealer where to start. ORIGINAL POST Ok guys, this is starting to get to me. My car has gotten to the point that I can predict when this will happen. Basically, after the car is driven, if I wait around 30 minutes to an hour and go start the car, it coughs like this. This is ONLY when the car is already been driven and warm. Start it and it coughs, shut it off, restart and back to normal, starts just fine. Cold start is also normal. Help me out. I'm getting upset at this point. http://youtu.be/TJRsjJg3EFg http://youtu.be/XJoZWXKX1C0 http://youtu.be/v8Yy4HHUsBQ
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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 Last edited by My Caroline; 08-26-2014 at 06:01 PM. |
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07-11-2014, 07:07 AM | #2 |
knows 2 facts about ducks
Drives: ...and they're both wrong Join Date: Aug 2009
Location: The HMS Invincible
Posts: 25,072
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Embedded them for you
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07-11-2014, 07:38 AM | #3 |
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no engine mods? sounds like something in the vacuum system?
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07-11-2014, 08:33 AM | #4 |
Drives: 2014 SS/RS M6 Join Date: Jun 2014
Location: Dallas
Posts: 52
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Just throwing it out there, might be a heatsoak issue. I had a jeep that would run rough only if started 10-30 minutes after being full warm. One of the injectors was getting heatsoaked, so the fuel would vaporize. This leaves one of the cylinders without fuel for a few seconds. The TSB solution was to insulate the offending injector that was subject to high temperatures from the intake manifold.
Like I said, I may be off base, but the symptoms are similar. |
07-11-2014, 08:48 AM | #5 | |
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Quote:
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2013 1SS/RS Coupe L99, Stainless Power Works LT Headers, SCT X4 Custom Tune from RDP, CAI Inc. Air Intake w/ Apex Scoop, VMAX CNC Ported Throttle Body, Solo Axle-Back Exhaust w/ J-pipes, Apex Catch Can, Husky Splash Guards, Heritage Grille, 3D Carbon Rear Spoiler, Oracle Chrome Turn Signal Bulbs, GM Reverse Light Trim Billets, Gorilla Black Locking Lugs, Emblem Pros Retro SS Badges/Custom Retro SS Kickplates/Under-hood Bowtie, 35% window Tint, Nitto Motivo Tires (6-8-18)
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07-11-2014, 08:51 AM | #6 |
Drives: 2014 CTS-V- totalled/ 45TH ss- SOLD Join Date: May 2013
Location: DFW, TX
Posts: 1,096
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I know I've had a few issues with heat soak after my cam. The un coated headers are giving off some serious heat. Getting coated headers and heat wrapping the fuel lines and wiring should help solve it. If you've been tuned, it's time to ditch stock manifolds if you haven't already
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2014 CTS-V... with some go-fast bits coming
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07-11-2014, 09:00 AM | #7 |
Drives: 2017 Camaro 2SS, 2011 Camaro 2LT Join Date: Jan 2014
Location: USA
Posts: 640
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Hmmm, that happens to me too after the car is warm everyday now. Cold starts are fine. Sometimes the car even makes a pop noise when I start it. It's been doing this for like a year now and had it for a little over 3 years.
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07-11-2014, 12:57 PM | #8 |
Drives: Black 2011 Camaro LS Join Date: Feb 2011
Location: Texas
Posts: 1,694
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Some good thoughts.
Engine is totally stock. Any other ideas?
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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 |
07-11-2014, 02:22 PM | #9 |
Institutionally Insane
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Sounds like your A/C compressor clutch kicked in.
Try starting with A/C off.
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It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspension, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas. What do you say, is it the new Bluesmobile or what?
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07-11-2014, 02:25 PM | #10 |
Drives: '14 2SS/RS 1LE BRM, '12 Cruze LT 6M Join Date: Jan 2012
Location: Phoenix, AZ
Posts: 706
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Have them check the fuel pressure to make sure it is holding in the lines after the car is shut off. My car did a similar thing recently and it turned out the fuel pump was bad.
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2014 - 2SS 1LE
Ordered - 10/11/13 TPW - 10/28/13 4B00 - 10/30/13 Arrived at dealer - 11/12/13 Arrived in my garage - 11/15/13 SLP Supercharger, SLP headers, SLP Loudmouth Exhaust, Hurst Short Throw Shifter, 1in Hotchkis Springs, SLP Cold-Air Intake, Painted Chrome Strip, Painted Rear Valance, and more to come soon. |
07-11-2014, 11:58 PM | #11 |
Drives: '14 1SS 1LE,'68 Chevelle,'70 Vette Join Date: Jan 2014
Location: Conroe/Sugarland, TX
Posts: 227
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Yep, ^^
Before you go chasing vacuum leaks and heat soak issues, check the fuel/air/spark first. I'd bet on a fuel pump issue first. After that an ignition issue. Make sure the pump is always kicking on when the key is turned, hot or cold and check the pressure obviously. Go out and drive it, if you can make the car have the symptom, you're light years ahead of chasing an intermittent issue! Good luck!
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Overkill is underrated....
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07-12-2014, 07:39 AM | #12 | |
Drives: 2017 2SS Join Date: Mar 2012
Location: Rolla, MO
Posts: 1,106
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Quote:
That is what I am hearing too.
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1996 Corvette - LT4
2017 Camaro 2SS 2019 GMC Sierra 2500 HD 2015 Harley Davidson Ultra Limited |
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07-12-2014, 08:19 AM | #13 |
Drives: 2017 Camaro 2SS, 2011 Camaro 2LT Join Date: Jan 2014
Location: USA
Posts: 640
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07-12-2014, 09:22 AM | #14 | |
Buick 455 Fan
Drives: 1970 Buick, 2012 1SS LS3 Join Date: Jun 2010
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I can't help myself
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