Fuel Return Valve Issue?

[dom14]

Have you checked the voltages present at idle and above 1500 rpm? What is the resistance of the coil?. After confirming that there is no voltage at idle, I would remove the solenoid and check to see if it is seating /sealing properly. Does it click in and out when given a 12 volt feed? Follow the procedure in the manual to release the fuel pressure before removing the solenoid.

I checked the voltage on the wires.
I got bizarre readings at first. At idling it was showing no voltage then revved it jumped into incrediable 30+ volts.
I thought it must have been a momentary fault with the multimeter.

I stopped the engine for few seconds and restarted and did the test again.
This time it shows 13.6v at idling & jumps to zero when revved to around 1500 rpm or more.

I'm still wondering whether the power to the Fuel Return Valve from the rpm sensor/sender is somewhat faulty, though
above bizarre reading might have been from a multimeter fault, 'cos

There's no way rpm sender/sensor unit can produce such amount of voltage?!!!!
What do you think?!