My mechanic advised the FPCM is within the factory fuel pump module and when the pump module is removed from the tank, it wont spin up at all.
I agree root cause is most likely external to the pump module itself but it doesnt appear to be:
* The fuel line itself
* The factory power circuit and relay as it was bypassed straight to the battery with a new fuse and relay
* The fuel i am using
* The amount of fuel left in the tank as i keep it above 1/4
* The mafless tune as VEs dont have any tunability of the fuel pump itself
Not sure what else it could be at this stage.
Have a look at the last 7 failures and how long each of my fuel pumps lasted:
·***1st*Factory fitted pump lasted exactly 1Y, 8M, 14D from when the car was first purchased brand new
·***2nd*Factory fitted pump lasted exactly 3Y, 6M, 22D
·***3rd*Ultratune fitted genuine factory pump lasted 7M, 28D
·***4th*Ultratune fitted genuine factory pump lasted 4M, 14D
·***5th*Ultratune fitted non genuine pump for SS lasted approx. 4 weeks before being replaced due to ongoing issues with starting vehicle
·***6th*Ultratune fitted genuine factory pump lasted 4M, 30D
·***7th*Ultratune fitted genuine factory pump lasted 3M, 15D
*
The last 4 fuel pumps lasted 4 months or less so not long at all.
Not sure how such a simple system can be impacted by anything other than an ongoing electrical issue, which has been going on for such a long time, and not impacting anything else in the vehicle.
Will wait to see what Holden/HSV have to say and what they recommend but the last few failures have highlighted that spare parts struggle to supply replacement pumps to customers as there seem to be more failured than we are aware of. I may just be an extreme case of a very common problem that hasnt been made public yet.