Thought I'd consult the brains trust before committing to a new fuel pump. What do you guys make of these sypmtoms? This I've worked out so far.

1 something causes the fuel pump to draw a lot of current and blow it's fuse.

2 sometimes it rights itself and a new fuse (15A) gets it going.

3 Sometimes it doesn't! You can hear the pump trying to spin but it seems stuck and draws a heap of current in this state. Nearly burnt out the wiring proving this.

Here's what I've checked.
1 Wiring loom to pump for shorts along the run.
2 Removed and bench tested (dry run) the pump, seems fine perhaps noisy.
3 checked fuel accumulator (next in line gadget from pump) seems fine, not blocked.
4 Replaced fuel filter, old one seemed restrictive and well past use by date in any case.
5 blown out fuel line to engine bay.

Questions
Could this be caused by something other than the pump itself? If the fuel distributor was not returning fuel to the tank properly would the pump stall or just spin away merrily? If so what would be the other symptoms of the regulator blocking up? Wouldn't that cause too much fuel pressure at the injectors and some pretty eratic running?

The car runs fine when the pump is working.

I've had these pumps fail in my Porsche 924s but the symptoms were different they'd just stick and a light tap would get them started.

Engine prefix GX
1800 K-jetronic CIS and electronic ignition.
Fuel pump 0580 254 980

Thoughts?
Comments?
Wisdom?

Thanks in advance
Pete Jones