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08-30-2021, 09:01 PM
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#1 |
 Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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Need help…..RESOLVED
I recently had a cam/heads build completed. The engine was pulled to complete the project. Everything was good for about 2 months when out of no where, my tech stated bouncing erratically. Car ran fine and continues to run fine but now the tack bounces non stop. I also have the following codes:
U0126 U0136 U0151 U1833 The shop checked the 3 grounds on the engine and said all appeared good. I believe this is a ground issue but I have no idea where. Does anyone have any suggestions? Is there a particular ground location or harness that would affect the modules related to those codes?
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD Last edited by MSU120; 10-01-2021 at 04:03 PM. |
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08-31-2021, 08:56 PM
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#2 |
 Drives: 2018 ZLE Join Date: Sep 2019
Location: TX
Posts: 18
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Check the wiring around your headers, you may have a melted wire. This post had similar issues and a melted wiring harness was the cause:
https://www.camaro6.com/forums/showthread.php?t=589245 |
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09-01-2021, 07:26 AM
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#3 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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Wow, we just went thru this on a 16 SS Camaro that my buddy installed a P1 SC on. However his had a miss before he did the install. After the install he still had one and we decided it had to be plugs and wires. He replaced those but still had a miss so we couldn't finish the tune. He decided he'd replace the springs, pushrods just to make sure he didn't have a broken spring. That didn't work either so he just had a feeling it could be a ground so he builds chassis for a living and had a ground kit laying around so he ran a new ground up front on the passenger side and it quit missing so we could finish the tune.
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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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09-01-2021, 07:18 PM
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#4 |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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That harness by the headers was relocated during the rebuild and is not near the headers. It’s actually behind the coolant reservoir. I’m at a loss.
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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09-05-2021, 06:07 PM
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#5 |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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I just looked again. The ground wire on the front cylinder head has a gouge in the rubber sleeve causing copper wire to be exposed. Could this be the issue? With the procharger on, I can’t reach the wire to re-wrap it and test it.
Thank you.
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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09-06-2021, 07:00 AM
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#6 |
       
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Add another ground cable. It has helped numerous people not only with a slow crank on a hot engine but also those with a bouncy tach and other weird electrical problems. This link has a lot of detail and describes several ways to add another ground cable: https://www.camaro6.com/forums/showthread.php?t=586153
Its worth a shot as its cheap and easy to do. Good luck! Keep us posted.
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2016 Camaro 1SS Hyper Blue 6MT NPP
2010 Camaro 2SS Cam/Headers/CAI/3.91 gears 476 rwhp/440 rwtq (sold) |
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10-01-2021, 01:40 PM
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#7 |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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Well…..the issue is resolved. It was a loose ground (near the alternator). I can’t believe one lose bolt caused so much anxiety.
 either way….it’s fixed!
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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