Anyone running twin Walbro 470 (F9000285) pumps

[fordsvtaz]

Were you running the FRPS before? Or did you do it along with the new pumps?

I wasn't running it before. AFRs are in the 14s when I'm cruising, it's just at idle when it starts getting a little high.

 

[fordsvtaz]

So just thinking out loud. In a return fuel system with a mechanical switching pumps for more or less flow should not require a retune. The lph of the pumps shouldn't matter. The regulator is mechanical and sets the fuel pressure....as long as the tune and install is correct.

Always a good idea to have the frps hooked up in a return style anyway. You can log delta pressure and depending on how the tune is set up can compensate for fluctuations in fuel pressure.

Let us know how it works out.

I will. Had to buy the FRPS adapter. Should have it Monday, then revise tune.
Thanks

 

[01yellercobra]

I wasn't running it before. AFRs are in the 14s when I'm cruising, it's just at idle when it starts getting a little high.

If you weren't running the FRPS before and it was running fine then it shouldn't matter now. The tune is set up not to have it.

I still say it's an install issue. Good luck getting it worked out.