Hi all,

I am wondering how to replicate the fuel pump relay staying on while the engine is cranking?

I have a stand alone setup with an E38 running an L77. I know the fuel pump will run for 2 -3 seconds when the ignition is initially turned on.

If commanding the starter replay externally from the ECU, will the fuel pump run from the low rpm signal it sees from the crank angle sensor? Or should I use a diode protected feed from the start relay to the fuel pump relay to make the pump run while cranking?

Thanks in advance for your thoughts,
Des