no "check engine" light???

[marty55]

its late and my eyes arent working right for the search

okay, i changed my duff fuel pump the other day for a walbro which all went to plan.
tonight i conked out, EFI relay was playing up a few weeks ago so i thought it was this. anyways fiddled with the relay and i eventually got all necessary dash lights on and got going.
on down the road, the dash lights flicked on for a second and went off again then went on and the car ground to a halt.
I turned the ignition key to on and all dash lights that come on when starting came on except the yellow "check engine" light.
so im thinking i have blown a fuse or something that is supplying the ecu and that is why my fuelling and ignition etc arent working.
I checked all the fuses(bonnet and beside accelerator) and all seem to be fine.
i guy i know tells me that the 30 A from the live battery terminal supplies the ecu and that it could be faulty. is this common? or should i be looking in another area.
im guessing that i cant do the engine diagnostics(shorting the plug) if the engine light does not come on at all.

please help