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09-16-2017, 04:56 PM
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#1 |
 
Drives: 2010 2LT Bumblebee Join Date: Apr 2013
Location: Maryland
Posts: 613
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Code P0300: All cylinders misfiring
Hello,
I am basically getting all the codes for each cylinder individually misfiring, plus code P0300 for random/multuple misfires detected. Since all cylinders are misfiring and all these codes popped up at the same time, could it mean that coincidentally both O2 sensors could have gone out, or all plugs went bad at the same time? For reference I had the motor swapped out for a junkyard motor with 50k miles last year, so all necessary components like spark plugs were also replaced at that time. New hi-flo cats were also installed 6 months ago, and a tune by IPF took care of a CEL that the cats+headers combo was throwing. Any advice on where the first place to start looking would be greatly appreciated!
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AirLift Air Suspension, Stainless Works Long Tube Headers + Hi-Flo Cats, Resonated X-Pipe, MRT V2 Mufflers, VMAX Ice-olator and Ported Throttle Body, Barton Short Throw Shifter, CAI Intake + Air Scoop
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09-17-2017, 12:11 PM
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#2 |
   
Drives: 2011ss/rs camaro Join Date: Sep 2011
Location: florida
Posts: 1,261
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Harness rubbed raw and grounding out....or loose ground
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 . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners |
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09-17-2017, 09:05 PM
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#3 |
 
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It sounds like a loose ground. Check the small grounds near the ECM
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5.98 @ 115mph
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09-17-2017, 09:12 PM
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#4 |
 
Drives: 2012 Camaro SS2 Ls3 Join Date: Nov 2016
Location: Apex, NC
Posts: 33
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Can you see scan tool data? I would like to look at the fuel trims. Since it's all cylinders you have to look at something that effects all cylinders. The chances of multiple parts failing at once is slim. Fuel trims would tell you if you had a possible MAF sensor issue or maybe got some bad gas.
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2012 LS-3 M6 - Tsp 229/244 .629/.615 112+3 - Johnson 2116lsr's - Manton 11/32 Pushrods - CHE Trunnions - BTR 660's - Rollermaster chain kit - TSP Lt's and exhaust - TSP Tune
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09-18-2017, 09:47 AM
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#5 |
    
Drives: 2010 SS 2SS M6 Join Date: Aug 2016
Location: Smithsburg, Md.
Posts: 2,445
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2LT..6 cyl?....timing chain probs...
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2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - 150K! - All work by me...
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09-18-2017, 10:04 AM
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#6 | |
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Drives: 2012 Camaro SS2 Ls3 Join Date: Nov 2016
Location: Apex, NC
Posts: 33
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Quote:
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2012 LS-3 M6 - Tsp 229/244 .629/.615 112+3 - Johnson 2116lsr's - Manton 11/32 Pushrods - CHE Trunnions - BTR 660's - Rollermaster chain kit - TSP Lt's and exhaust - TSP Tune
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09-24-2017, 09:33 PM
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#7 | |
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Drives: 2010 2LT Bumblebee Join Date: Apr 2013
Location: Maryland
Posts: 613
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Quote:
Also, its been a week since I reset through OBD2 and no code since, so fingers crossed...
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AirLift Air Suspension, Stainless Works Long Tube Headers + Hi-Flo Cats, Resonated X-Pipe, MRT V2 Mufflers, VMAX Ice-olator and Ported Throttle Body, Barton Short Throw Shifter, CAI Intake + Air Scoop
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