Attention: TDR Forum Junkies 
Howdy all, I've received countless help from this forum so I thought I'd give back with my solution for a fuel pressure gauge from the tank to the cp3. A while back I was trying to diagnose a starting issue and had a rail pressure gauge set up, but nothing telling me what was coming into the cp3. With lift pumps being a common failure point, I figured I needed to monitor that side of the system as well.
I ended up basically taping into the small rubber section of the fuel line from the filter to the cp3 with the aluminum fitting below.
From there I routed a line into the cab and connected it to the small mechanical fuel pressure gauge, also below.
It mounts where the circular 12v outlet is, below the electronic 4wd selector. I just popped the whole trim piece out, removed the 12v outlet, stashed the connector back in the dash, and drilled the hole out to 1-1/2". I ended up having to sand it a bit to get the gauge to fit, but it ended up being a snug fit, and in my opinion, doesn't look too bad. If you're tall (like me) it can be a little difficult to get an accurate reading at a glance, but that's mostly due to the angle.
It sucks that there isn't a 0-30 psi gauge, because I tried the 0-15 psi gauge first, and my lift pump is putting out ~17psi at idle and inly drops down to ~13-14psi while driving (not sure if this is an issue, still trying to figure it out. doesn't affect starting/stopping/driving from what I can tell so far).
Since I already had the hose clamps, fuel line, thread tape, and the hole saw/sand paper for the dash piece, the whole thing cost me ~$50 in parts. You could save some money by locating or making the fuel line that feeds the gauge for cheaper, but this one was already good to go from amazon and was just about the right length (about 6-8" too long).
I've had it on for about 2000 miles so far with no issues and would happily do it again, but maybe try and find a 0-30 gauge and make my own line this time.
Enjoy
I ended up basically taping into the small rubber section of the fuel line from the filter to the cp3 with the aluminum fitting below.
From there I routed a line into the cab and connected it to the small mechanical fuel pressure gauge, also below.
It mounts where the circular 12v outlet is, below the electronic 4wd selector. I just popped the whole trim piece out, removed the 12v outlet, stashed the connector back in the dash, and drilled the hole out to 1-1/2". I ended up having to sand it a bit to get the gauge to fit, but it ended up being a snug fit, and in my opinion, doesn't look too bad. If you're tall (like me) it can be a little difficult to get an accurate reading at a glance, but that's mostly due to the angle.
It sucks that there isn't a 0-30 psi gauge, because I tried the 0-15 psi gauge first, and my lift pump is putting out ~17psi at idle and inly drops down to ~13-14psi while driving (not sure if this is an issue, still trying to figure it out. doesn't affect starting/stopping/driving from what I can tell so far).
Since I already had the hose clamps, fuel line, thread tape, and the hole saw/sand paper for the dash piece, the whole thing cost me ~$50 in parts. You could save some money by locating or making the fuel line that feeds the gauge for cheaper, but this one was already good to go from amazon and was just about the right length (about 6-8" too long).
I've had it on for about 2000 miles so far with no issues and would happily do it again, but maybe try and find a 0-30 gauge and make my own line this time.
Enjoy
