Welcome to the world of Mk1/Williams ownership Jamie!
Last night driving along, doing nothing outrageous. BOOOOM! All power cuts out and no drive, struggled to a stop at the side of the road, tried to restart it, turned over repeatedly, but nothing. Had a quick chat to Whiteley on the phone. Checked the fuses, Fuse 10 in the engine bay had blown, so put another in, it started up again and off i was on my way! 200 yards later, same happened, but managed to get it out of the middle of the road this time, LOL!
Anyway i got the haynes manual out that i have in the car, and by the looks of it, it was 'engine functions' fuse that had blown, had a quick look at fuel pump, wiggled a few wires about and it didn't do much. Whiteley had arrived by this point with a hand full of 30amp fuses, so put another in and got about 1/2 mile down the road and i thought WAHEY, its sorted! then BOOM, it went again, so we waited for a while for recovery to come and take the car back to my work and had a quick chat to Daz & Mat Brown, both had a feeling it was loom related/fuel related. Wiring all looked ok in usual places, near chassis legs etc.
Got to work this morning and it kept starting and blowing fuses. So we tested the fuses and they all had power running through them, no problems at the fuse box. Tested the adapter on the fuel pump and there was power going in. So took the pump out and put a direct 12v into it, and it quickly deposited all the fuel that was remaining in the system, so the pump appeared ok.
Anyway, put the pump back in, if only to merely keep the petrol smell out of the cabin! I started the car up again, whilst it was in and it started up and immediately cut out, due to a lack of fuel. I checked fuse OK! So i tried it again and started it and had it running off and on for approx 20mins, revving happily up to around 3/4k. Thought brilliant, sorted it. How wrong was i to be! Thought ill get it in and have a quick check over it before i leave work. Went to start it and it cut out straight away!
I am 100% confident that its the pump, so i am going down a Walbro 255 pump, just need to figure out which model i need as there are two options on the style of outlet mine has.
Oh, and many thanks to Whiteley for helping me and taking me home last night,