Thanks Gomog,
To confirm the fuelpump is in the (right hand) fuel tank and neither the original pump nor the Walbro conversion in tank pumps have pressure control.
The fuel is pumped to the injectors and the fuel filter in the return line has the pressure control - call it a valve or regulator as you wish. This is preset at 58 psi and monitored via the ECU so if the pressure drops the spark is cut off.
