I just noticed today that when I switch on the ignition, I hear the fuel pump start. I'm not sure this is right. I thought the pump only ran when the fuel injection 'balance' plate came off its rest stop as the starter ran and air inducted (isn't there a microswitch?). I know where the main inj pump relay is in the engine bay. Does this fail?, or is the microswitch in the injection body the culprit?. Is there any history with either of these items? What 'is' correct operation.
Lots of small questions sorry.
Its a 77 280E W123 with the M110 unit.
Thanks........... Rob.