07-17-2014, 07:51 AM | #1 |
Drives: 2010 2SS/RS Join Date: Jan 2010
Location: Haughton, LA
Posts: 292
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Backfiring
I have a 2010 LS3 cammed camaro that is backfiring in all gears when I roll into the throttle or stomp on it. Also when I come to a stop it sometimes starts to rev up with my foot on the brake and clutch with the highest around 3k rpm. I cleaned the maf and checked plugs and wires. Could it be a bad tune or something else?
Thanks for the help |
07-17-2014, 08:45 AM | #2 |
Drives: 14 2SS/RS Triple Black Ragtop LS3 Join Date: Mar 2014
Location: California Bay Area 95008
Posts: 305
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Please describe all the improvements, besides the cam, that you've made.
Cover the whole intake through exhaust. I.E. headers, CAI, cat delete, etc. Has it been tuned? -s |
07-17-2014, 11:16 AM | #3 |
Drives: 2010 2SS/RS Join Date: Jan 2010
Location: Haughton, LA
Posts: 292
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Cam, full exhaust with x pipe, headers and no cats, cai, ported tb, underdrive pulley, dyno tuned about a year ago. I am sure I missed something
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07-19-2014, 12:32 PM | #4 |
Drives: 2013 2lt Join Date: May 2014
Location: Indiana
Posts: 72
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I would say carbon on the piston heads and possibly a leaky injector.
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07-19-2014, 12:36 PM | #5 |
army life
Drives: 2018 hyper blue zl1 Join Date: Feb 2011
Location: clarksville, tn
Posts: 868
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I had the same problem check yoru 02 sensor wires make sure they haven't melted on the headers sending a bad signal to the ecm
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Mods: lingenfelter 15% overdrive pulley, ATI balancer, kooks headers, DSX low side aux pump, DSX flex fuel, GPI stage 2 cam, trans tune, cat delete, rear seat delete, rotofab cai
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07-19-2014, 08:47 PM | #6 |
Drives: 2010 2SS Black/IOM Join Date: Sep 2013
Location: Jacksonville, FL
Posts: 108
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Is your backfiring similar to a popping noise? I have a CAI, LT Headers/high flow cats, and catback exhaust. Every time I let the RPMs slow down after accelerating, I hear: grumble, grumble, grumble, pop, pop, grumble, grumble, pop...
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07-19-2014, 08:59 PM | #7 |
That's normal for the V8s. It's just the unburnt fuel igniting in the exhaust. It shouldn't happen when accelerating though
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07-19-2014, 09:13 PM | #8 |
Drives: 2010 2SS Black/IOM Join Date: Sep 2013
Location: Jacksonville, FL
Posts: 108
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07-20-2014, 12:08 AM | #9 |
Search Ninja
Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009
Location: Central Ark
Posts: 7,183
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If it didn't do it when you first got tuned, it's not the tune. Tunes don't go "bad" after a while. Something else is causing it. Could be the spark plugs or wires.
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2010 Black 2SS/RS A6
Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train. |
07-20-2014, 09:00 AM | #10 |
Drives: 2012 1SS, 6spd. many mods 478 rwhp Join Date: Apr 2014
Location: Harrisburg Pa.
Posts: 283
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I have a crackling/ popping noise out the exhaust at around 2200-3200 rpm if the engine temp isn't up to operating level. It seems to be at part throttle accelerating, usually in 3rd and 4th gear. Sometimes it will do it even when the oil temp is up, but I can't put a specific scenario on it. If it does it once warm it won't do it again, kind of like something needed cleared out.
I thought about unburned fuel, but I also worry it's running lean or rich at that spot, sounding like a mis-fire. I don't have the decel popping though either. ECS 'devil' cam 1 7/8 long tubes free flow cats Corsa K+N cai underdrive pulley M6 |
07-22-2014, 09:11 PM | #11 |
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Drives: TAMPA TUNING FACEBOOK & INSTAGRAM Join Date: Oct 2010
Location: Tampa, Fl
Posts: 3,044
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Unless you have an exhaust leak, You can get rid of the most of the popping sound on deceleration by making your DFCO out of range.
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