WM stalling and won't start when hot (dual fuel)

[OzJD]

My new (to me) Caprice V (V8) died on me today when switching to petrol.

I've tried it again tonight, and it started up when cool, and cut out a few minutes later.

I was able to set it to start on LPG and it runs fine. Fuel Injectors are firing, as well as spark.

I'm not sure where to go from here...

Thoughts are
1. Fuel Pump
2. LPG Controller (not even sure where they've installed it - aftermarket)
3. Fuel Relay? (Can't find it... NRMA guy said it might be under the battery in the boot)
4. Coolant temp sensor... Doesn't seem bad, but I've heard of similar issues

Error code: P023F was coming up, but I was unable to find a definition for it. Any ideas where I can find it?

As above, I'm not sure about much as I am really not familiar with the car, will probably buy a service manual tomorrow and learn a bit more. Any suggestions?

I think it's not CAS as it's a V8... That sound right?

Thanks in advance.

 

[illlusion]

That code comes up as fuel pump secondary circuit open check the fuel pump relay not sure where it's located the ve has 3 fuse box locations but the code could also be generated because of the lpg system

 

[OzJD]

That's awesome... But not sure what to make of it.

Might make more sense if I can pick up a manual today :-/
Any idea - I'm guessing it's secondary circuit rather than secondary fuel pump...

 

[illlusion]

Yeah a back up circuit normally runs through the oil pressure switch on the pre ve Commodores

 

[OzJD]

Does it not on the VE or VE II?

 

[illlusion]

Not sure never had to go looking for that type of fault yet

 

[OzJD]

I know it's been forever, but I thought I'd post the outcome for those who find this... (I did from Google).

I'd decided it was the petrol pump and got it changed. Whilst doing that we found that one wire in the connector had burned out. Fixed that and never had an issue with it again.