Fuel tank drain 2017 Mustang

[Davem3261]

What would I change in the fuel pump tab to get the pump to constantly run to drain the tank? Running stock PWM pumps.

[veeefour]

Nothing as fuel pump in 2gen is BCM driven. Short 2 pins under the seat or wire a switch.

[Davem3261]

I changed fuel pump>pump command signal>off duty cycle to 49% and the pump runs constantly. tank is drained

[veeefour]

I changed fuel pump>pump command signal>off duty cycle to 49% and the pump runs constantly. tank is drained

Must be a one off case as this never worked for me in any mustang no matter what is set there.

[Davem3261]

Lund gave me a tank drain tune. His works, logged it and the pump ran constantly at 49%. I was curious how it worked. I put the mustang at 49% drained that. Did the same with my F150 to go back to pump gas.

[veeefour]

Might be this works in the lund's OS - who knows It never did for me.

Anyways this got me curious, might try again and hook up an oscilloscope.

[Davem3261]

I modified my stock file so it was using the stock OS