Hey all,
I have a '73 911s that had a 3.0L put it in while still utilizing the stock mechanical fuel injection (old school . . . not Kjet or any derrivative). When I turn the key on the electric fuel pump that feeds the MFI runs whether or not the engine is running. I thought this was a by product of the engine conversion, but when I was looking at a schematic in a Haynes manual it seems this is the way it was from the factory. There's a "speed switch" in there and I expected to see that some how attached to the pump but seems like that's more associated with the governor.
If anyone is aware of the factory relay/sensor configuration that should turn the pump on and off (if there was one) please share. There's a Bosch relay that's triggered by ignition pulses that I can make work if there was no provision to begin with or other suggestions? Don't think it's a good thing the pump runs when the engine's not running, especially since she's a track car.
Thanks,
Sean