11-03-2020, 12:45 AM | #1 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Misfire only at wot
So when ever I do a pull top of 3rd and 4th my engine light will flicker for misfires. If I continue in 5th everything disables, stabil trak, rev match, axle and other stuff. I’ve swapped plugs, wires. The issue still is one the same 3 cylinders 3,4,6. I haven’t swapped the coils yet but that’s the next thing. If that doesn’t change the issue what’s everyone’s thoughts of the issue.
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
11-03-2020, 10:05 AM | #2 |
Drives: 2017 Camaro 2SS Join Date: Jul 2016
Location: SC
Posts: 185
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Did you change anything before the issue started? Is it happening on and off wmi? What mix are you running? I have an Audi ttrs with a big turbo and 1000cc wmi. Had pretty good misfire when running stock plug gap. Dropping it from .035 to .025 fixed it. Not sure if this is applicable given its happening on the same 3 cylinders for you but figured I'd mention it.
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2017 2SS A8 TSP LT's, ported msd/95 mm, e85
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11-03-2020, 02:09 PM | #3 |
Drives: 2018 1SS 1LE Join Date: Dec 2012
Location: NY
Posts: 397
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I would consider injectors
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11-03-2020, 02:30 PM | #4 | |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Quote:
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
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11-03-2020, 02:32 PM | #5 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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I had that issue long time ago and it was a spark plug wire. Found it when we were on the dyno.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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11-03-2020, 02:38 PM | #6 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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I can look into them but not seeing a issue with flow or anything.
__________________
2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
11-03-2020, 02:50 PM | #7 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Wires are new and are all good I’ve also swapped the ones around that were on the issue cylinders and the issue stayed with the cylinder with different wires.
__________________
2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
11-03-2020, 02:55 PM | #8 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,814
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Is it still SBE? Have you performed a Compression test?
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
11-04-2020, 12:50 AM | #9 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Not yet and haven’t checked injectors but everything seems good but the misfires on the log.
Honestly have some weird feeling it’s a electrical issue cause the cars performing great. Even on the dyno was health. But since then I’ve been noticing the light flicker and I just clear it cause I haven’t actually done any pulls till recent. This all happened since headers. And intake swap.
__________________
2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
11-04-2020, 06:59 AM | #10 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,814
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Ahh...from what I have read in the past, odd issues like you describe after header install indicates potentially some damage to the wiring harness on the passenger side.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
11-04-2020, 08:18 AM | #11 |
Account Suspended
Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011
Location: St. Charles, IL
Posts: 18,663
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Your headers can be eating your wires up pretty quick. Make sure they aren't laying on the header or close enough to burn one. Also, I'd run a smoke test and confirm you don't have a vacuum leak on the intake.
When we have a car come in with a misfire it's almost always the wires. |
11-04-2020, 10:17 AM | #12 | ||
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Quote:
Quote:
__________________
2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
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11-04-2020, 10:14 PM | #13 | |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
|
Quote:
__________________
2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
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11-06-2020, 08:52 PM | #14 |
Drives: 17 hyper blue 2SS M6 Join Date: Mar 2018
Location: NorCal
Posts: 601
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When I installed my headers I put a hairline crack in 1 plug, super hard to see. It was doing exactly what you described. Miss at WOT. I changed all 8 and the issue went away.
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