Have taken out the pump and that was where the fault lay, short-circuiting between ground and positive.

Brand new AC Delco pump so I was promised a new one from the supplier.

Again, thank you George for your patience and help.

Per

 

Glad to help and glad it's fixed. Please perform the voltage test in post #18 to make sure that the new pump is getting strong net voltage so that the new one lasts for 100k miles

George

 

I'll do that test and I'll check all the wiring and connections before I put the tank back in.

Thanks
Per

 

Update on this.

Got a new pump in place and then it started right away and has since started every time, the only thing now is that the engine occasionally dies when we drive, but immediately starts again without any problem.
Don`t get any codes, so I'm not sure what that might be.

Has some problem with cylinder 4 misfire when idling, but it disappears when the revs go up, and we notice nothing else on the engine in terms of power and speed.

Per