djkeenan

My car cranks but doesn't start. I've checked ignition and I've checked fuel pump is supplying by filling up a measuring jug. I've had the fuel rail out today and confirmed the injectors all have the same resistance (15.2 ohms) and they are firing (fired them onto some a4 paper). Put the fuel rail back together and car starts immediatly. Revved it and all sounded good with all pistons firing. Turned car off and back on and is back to cranking with no start.

Thinking an empty fuel rail caused the fuel pressure regulator to allow enough fuel into the car to start it. How can I confirm something is up with the fuel pressure regulator?

Engine is an MGF 1.8 MPI mems3 from 2001

Edit: should add the car starts for a second if I spray easy start spray into the intake.