I just realised what the problem *might* be
My car (and many older Toyota's) have a 'circuit opening relay' that controls a few things, one of them being the fuel pump.
Now the new ECU has its own Fuel Pump relay, so I pulled the 'Circuit opening relay' out to find out which wire goes to the fuel pump so I could wire my new relay straight to the pump (if you get what I am saying).
But I didn't put the relay back in coz I didnt think I needed it.
Any idea if I do?
I'll put it back in first try tomoz nite, and see if that works.