Went at this for an hour today, checked fuel pump relay, wasn't coming in, I swapped ecu's, still nothing, so I've some wiring issue there. I bypassed the fuel pump relay and still nothing, checked voltage both sides of the pump and I had 12v on both sides so I reckon I've an earthing issue there,
wired pump directly to battery, turned engine over and it fired, YYUUPP!
Still have to adjust fuel pressure and a few other bits but its running anyway.




How does the ecu control the fuel pump relay? does it provide 12v or a ground to the relay?