VT V6 stall and missing

[holster]

Hi,

My VT has just started to miss on acceleration sometimes. Light or heavy still does it.
Also can be idling, engine fan kicks in revs go up for a second then engine stumbles and stalls once in a while.
Can also be slow to crank when hot. I did remember something about the negative battery cable fault with the VT where the cable would break down when hot.
Hope this makes sense.

Cheers

 

[wortus]

Try checking your spark plug leads to see if anyof them are either open circuit or too high in resistance.

 

[holster]

Try checking your spark plug leads to see if any of them are either open circuit or too high in resistance.

Sorry meant to put in my post that I have just recently changed Fuel Pump, Leads and Plugs, CAS and DFI Module.

 

[billythakid]

Sorry meant to put in my post that I have just recently changed Fuel Pump, Leads and Plugs, CAS and DFI Module.

Coil packs changed with DFI ?
New fuel filter with pump ?

 

[SM1D3Y]

+1 coil packs

 

[holster]

Coil packs changed with DFI ?
New fuel filter with pump ?

Yep new filter as well.
Didn't change coil pack but did change one that had cracked a few weeks back.
Will check them again.

 

[adam10_1990]

Also can be idling, engine fan kicks in revs go up for a second then engine stumbles and stalls once in a while.
Can also be slow to crank when hot. I did remember something about the negative battery cable fault with the VT where the cable would break down when hot.
Hope this makes sense.

Cheers

Could perhaps be alternator related,

Like the ecu doesnt get the right voltage, (like the fan puts too much strain on the electrics) and then stalls out.

And yes, there is a large wire on the back of the alternator which does degrade, I had one let go on me and luckily i only noticed because of battery going flat.

 

[adam10_1990]

https://forums.justcommodores.com.au/threads/vs-v6-owners-check-out.5910

 

[devilly]

check battery and all connectors ,check spark plugs,vacuum leak check 3 hoses at rear of motor,put in fuel injector cleaner could have a blocked injector.also disconnect battery then check the nut on the back of alternator make sure its tight.

 

[1_johnboy]

sounds alot like a vacuum leak, try test for that