Fuel pump works fine on a separate battery but something is stopping the fuel getting Into the cylinders... Plugs are completely dry even after hours of cranking... !!! There is a relay that clicks when I turn the ignition on and normally straight after the fuel pump will prime. Iv swapped the relays and it make no difference, tried everything there’s just no live feed to the fuel pump, wire loom is undamaged Iv put new connectors on the wire to the fuel pump, swapped over the stepper motor, ECU, MAFM, throttle sensor, checked the Neg of the coil to the ECU and the fuel pump still won’t start up on the first part of the turn on the key...