hello, guys having a few wee problems with my boiler, the oil pump packed up so i have fitted a new pump, as this was a newer model pump,there are three wires from the fuel solenenoid , the old unit only had two wires a blue, a brown ,,,, the nw unit has a blue a brown and an earth, can you tell me which terminal inside th box the earth should go to. I have just linked it in with the other earths for the motor, it was running fine but sometimes now the fan motor is buzzing and not turning, when i loosn the pump the motor turns, could this be cause the solenoid is not reliving the fuel presure prior to startup thus overloading the motor,also what are the electrode gaps and the protrusion settings,also what should the nozzle size be for kero,any help would be much appreciated