IP Full Load Adjustment Procedure for the MW and M pumps
IP Full Load Adjustment Procedure for the MW and M pumps
10psi at idle, a little more.. maybe 12 with RPM. The return fuel line off the IP is connected with a banjo bolt that has a spring with ball in it. This is what sets the pressure. I would venture a guess that over time this spring degrades and the pressure drops... maybe its time to install a restricting orifice of some sort to try to make more pressure..
BTW- You can't get to the spring, so it's neither adjustable nor upgradeable.