GT 1.9JTD Non-start fuel pump problem
I've been having an intermittent problem with starting my GT that has been on going since the summer.
It appears to be a problem with power not getting to the internal fuel tank pump as the car turns over and occasionally gives a "cough" but it won't fire up. But this isn't every time, probably once a week and tends to be the morning after a longish journey (I drive 60-miles per day, with roughly one 200-mile trip per week). And the engine doesn't cut out whilst I'm driving.
The RAC, an alfa dealership and a good independent garage have all given it "extensive diagnostics" and I have paid out for the pump relay, the pump itself and the battery (after I killed it) all to be replaced. I also identified a loose plug under the fuse box by the battery (in line with the pump fuse) and that was "fixed" with a cable tie securing the locking tab.
Apparently the computer shows a "fuel compression" error, but as I understand it, that could apply to anything in the fuel system.
The problem will sometimes go away after (a) waiting a while, (b) I've wiggled the wires, fuses and relays around the battery and under the steering wheel (with little clue as to what I'm doing), or (c) the RAC turn up / it gets to the garage; but I don't know if any of this actually works or is just coincidence.
Has anyone got any bright ideas? It's currently booked into the dealership again, but I don't hold up much hope for them.
I would grateful for any help, Thanks!