Fuel pressure advice
 

So I have 95 percent of this swap done starts drives and runs great. I have the AC to take care of. I have the details in an old forum. My last issue is fuel pressure. Donor was a 96 explorer but I bought a return less fuel rail. The rest of the fuel system is 2001 3.0 for Ranger. So return line from the filter. Any easy ways to dial back the fuel pressure to 42 PSI? I was thinking about replacing the stock filter and possibly putting a regular and micron filter there. Just use barbed to AN fittings. Would this work? I'm in Vegas if someone has some free time. I might even pay someone to get it done.

The fuel pressure regulator(FPR) on a 2001 Ranger is in the gas tank on the fuel pump assembly, its the round metal and plastic unit about 1/2 way up assembly
The 3rd hose on the filter is connected to the FPR in the tank
Picture here: https://content.instructables.com/OR...bounds&frame=1
Its the black unit 1/2 way up with the 2 hoses

FPR is set for 55-65psi
Pump is capable for 80+psi

I don't think there is any adjustment possible for the in tank FPR
A weaker spring?
Its just a spring valve that's pushed open at around 60psi, +/- 5psi

But what you could for sure do is to eliminate the FPR, connect its 2 hoses together in the tank so return fuel exits at the bottom of assembly, as shown

Then add an adjustable FPR, with return, on the frame rail and switch to a 2 port filter

So pump hose goes to FPR then out to filter
Return on FPR goes back to tank

You want the FPR outside of the gas tank because this is a non-standard setup so you won't know what the service life is, and you also may/will need to adjust it
So all the "plumbing" is there you just need to adapt it to your use

Cool. We are basically on the same page. I just didn't know you can/had to bypass the FPR in the tank or that it was even separate from the pump. I never had to mess with fuel pumps and regulators yet. That's why I asked. So I would not make a costly mistake and get stranded. Thank you.

Fuel system should work as is, might be rough startup until warm up and O2s are on line and computer can adjust the mix

You would then start to get Rich Codes because Computer is basing fuel flow thru injectors at 40psi, but it could be as high as 65psi
Rich codes are set when there is a 20% difference, and that's a 40+% difference

You might be able to use smaller injectors, you have to do the math to see how small
The computer is programmed for injector size(pounds/hour) and fuel pressure, no sensors for these, lol
So smaller injector will have same flow at 60psi as a larger injector at 40psi
There may be a chart for that, Pounds per Hour at XX pressure

It runs the way it is. I'm getting the rich codes though. That's why I want to adjust the fuel pressure. Hope it will have all the OBD2 working with no check engine lights on after. Plus I'm not sure what effects the high fuel pressure could have long run. Why not just make it right ya know.
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High pressure won't effect the fuel system, it was designed for 65psi, its just the computer that's the issue at this point

But yes, I agree, way easier down the road to get STOCK parts than mix and match custom parts
The new FPR is the only real change