vy ss will start, rev high than cut straight out.. help please

[Toby andi]

so the other day driving home in my vy ss manual a ignition lead decided to pop off on its own and started running real rough, i pulled over and upon inspection the lead was corroded so i tried clipping it back on and continued on my way home okay on 7 cylinders, got home pulled all the leads off and replaced with new ones now it starts, revs high than cuts out straight away, all within like 1-2 seconds. i dont understand how it could drive okay on seven cylinders to home now with 8 it wont run? after trying it twice a check engine light comes up,all wires seem to be intact etc..

 

[Pollushon]

The answer likely lives on your ECU. Do you have access to a tech 2 or Odb2 and app?

 

[Toby andi]

i will have today, im just hoping it connects to this car, wouldnt connect to my old ecotec. surely someone has had something similar happen and has found the problem

 

[Pollushon]

Yep, for me it was my tps, new one is on the way. I only knew this because it flagged a low voltage tps code

You could stab in the dark all day long but that error code will help pinpoint the problem.

I always recommend this in your toolbox, money well spent.

https://www.envyouscustoms.com/diagnostics/diagnostic-kits/elm327-cable/

 

[Toby andi]

okay so i didnt get that one but i did get a different one from autobarn, still not showing codes tho it does connect to my car. im thinking it may be electrical, starter or alternator

 

[Pollushon]

ECU will store the code. Did you disconnect the battery since last check engine?

 

[accentstencil]

The starter or alternator is not going to be the problem. If it was the alternator you would get a battery warning light, not CEL.
Like Pollushon, I also recommend this: https://www.envyouscustoms.com/diagnostics/diagnostic-kits/elm327-cable/
It definitely works with the LS1, unlike many other scanner. A lot of them connect to the PCM/ECU but can't read the fault codes. See if you can get your money back from Autobarn.