vx v6 cranks but not starting up

[kirraweeae]

Time to look at the electrics then.

Youve ruled out DFI/ECM, Leads, coils, plugs.

Hmm check earth strap to engine block ? The starter could be piking up negative through the harness. Actually it would throw an undervolt alarm if this was the case, so it's not likeley.

That leaves just DFI harness and contacts, ECM/PCM harness and connections (all of which would throw fault codes). All thats left is your ignition circuitry and the Key barrel.

$10 bucks says Abba is right.

Just removed metal sheilds from plug leads car runs.
am going to fit genuine leads only from now on.
bosch leads that were fitted shorted out on sheilds from first start.
Thankyou for all your help Dave

 

[madmatt2006]

Hi Guy's

I know this post is old, But I have identical problem in a VZ in the above post he mentions "Just removed metal sheilds from plug leads car runs"

what metal shield is he referring to anyone got a picture?

my posts on the problem

https://forums.justcommodores.com.au/threads/what-has-control-over-the-spark.272628/

https://forums.justcommodores.com.au/threads/the-cursed-vz-svz-that-just-will-no-run.272610/

 

[DGC76]

On my Vx Calais I found it was the freeplay in the key & ignition barrel causing an excessive gap between the two metal tabs on the key reader ring & the metal tab on the key. All I did was flip out one end of both the metal tabs on the key reader, which reduced the gap & car starts everytime now..

 

[Vx77]

I have a vx commodore v6 not starting,cranks over but not firing up. We have spark,fuel injection, fuel pressure and fuel volume. The vehicle has had a second hand motor fitted (same problem with both motors). We have tried another comutper,bcm, coils and dfi module. We have given the vehicle another fuel supply but still turns over and not starting up. second hand motor came with it's own sensors.
any ideas .
thanks Dave

Both my step brother and I have commodores with the same problem, we have discovered that the immobilizer sometimes doesn't recognize that the car has been unlocked, we have to get out of the car, lock it, then unlock it a couple of times, get in and the car starts straight away

 

[accentstencil]

Check that the the metal piece protruding from the key remote is making contact with the key reader around the ignition.
Try pressing the unlock button on the key before turning it to start.

 

[Aussie Trev]

Hi Guy's

I know this post is old, But I have identical problem in a VZ in the above post he mentions "Just removed metal sheilds from plug leads car runs"

what metal shield is he referring to anyone got a picture?

my posts on the problem

https://forums.justcommodores.com.au/threads/what-has-control-over-the-spark.272628/

https://forums.justcommodores.com.au/threads/the-cursed-vz-svz-that-just-will-no-run.272610/

On earlier models they used plug leads with a sprung metal cover over the plug end that were a bit of a pain in the butt.