Tuning for stand alone

[blackdog76]

With regard to a stand alone harness for and engine swap, I keep reading that speartech and others ”tune” for things like running a standard (non-pwm) fuel pump. Many are ditching the PWM pump and using a standard walbro 255lph that’s the same as an LS swap using ECM x1 pin 44 (a wire that sends a signal for a relay to operate the pump).

From what my tuner said there’s no way to tune that. So is the tuning that they’re speaking of just deleting the codes for not having a fuel pump module? Or is there truly a way to tune the ECM to control the relay that sends the signal?

[RC1]

On the X1 connector pin 44, circuit 5660 is normally the output to the Fuel Pump module. It can be wired to a relay that controls the fuel pump. It will give a normal 2-3 second prime with the key on, and then run the pump once the engine is started. In the fuel section in the tune software you can tell it that there is no Fuel Module used, and the type of pump that is being used.
This information is assuming an E92 ECM.

[blackdog76]

On the X1 connector pin 44, circuit 5660 is normally the output to the Fuel Pump module. It can be wired to a relay that controls the fuel pump. It will give a normal 2-3 second prime with the key on, and then run the pump once the engine is started. In the fuel section in the tune software you can tell it that there is no Fuel Module used, and the type of pump that is being used.
This information is assuming an E92 ECM.

It is a E92, yes. Thanks for that info, I’ll pass it along.

[sevinn]

What you want is absolutely possible. Just put a good pump in it and forget the fpcm.