Hi

Here is a question for anyone out there running a Fuel Injected car using the Low Pressure Pump => Swirl Pot => High Pressure pump arrangement.

How do you feed the two fuel pumps with power, do you feed the LP pump straight from the ignition and the HP pump from the ECU, or do you just power both of them from the ECU. My worry is the ECU switches off the pump(s) when they are not needed, so the LP pump won't get a chance to fill the swirl pot.

I think I've answered my own question, but anyone else opinions greatly welcomed.

TIA

Scott

My LP pump runs permanently off a switched live from the ignition and the HP pump is controlled from the ECU

Sounds like a good excuse for some extra switches and a full blown start up sequence to me

You could just have a push button to bypass the fuel pump relay and manually prime the low pressure pump.

David

circuit diag from Megasquirt FAQ's