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Shredder · 02-01-2008, 01:34 PM

Fuel pressure gauge..
This one was kinda a pain, not to install, but for other reasons.
You need an adapter to install this gauge also.
This one cost me about $80, which is rediculous because its jsut a simple block of machined aluminum.

You are going to hear "in hind sight" a lot because this was a huge learning process lol
so, in hind sight, I would have picked a different one based on color alone. I got this one because I liked that it had 2 ports on it, and even came with the mechanical pressure gauge you see mounted to it. When I open my hood people tend to gravitate to that gauge. Anyways on the right of it you see the fuel pressure seding unit from the autometer gauge.

The procedure I went thru was this.
Remove the fuel delivery line, make sure you have plenty of paper towels handy, and your engine is cool! I didnt have enough paper towels ready and had to spend a lot of time soaking up the fuel that poured out when I popped off that line. I recomend just jamming paper towels all around the area, specially in the the valleys between the intake tubes.

Remove the stock piece from the fuel rail by removing the two bolts (8mm I THINK, I should have written all this down when I was done that day)
Insert the addapter and bolt it all back together. I believe the bolts needed to be tightened to 8ft lbs, and for the life of me I couldnt find a torque wrench that would go that low. I ended up finding one online.. so I basicly tightened it to close to what I thought was 8ft lbs, then re did it when I got the torque wrench.. I was damn close to 8ft lbs lol

Here you can see the fuel pressure adaptrer and the place where i tapped the vacume line.

I still have the wires exposed there.. After I first installed it, I put all the wires in those plastic looms. After I ran the wires to the gauges, the fuel pressure gauge would just stay pinned at 100 PSI! I tested the gauge with my multimeter and it seemed fine, pluged another sensor into it and it read correctly. I then tested the wires and saw that the sensor was sending a constant 4.75 volts, which is equivilent to 100 PSI. I figured the sending unit was bad. I talked to Leo at LTM Global and he was more than helpfull in getting me a replacement sending unit right away (its actually way more involved than that.. because I made another mistake and needed something else replaced, and Leo was right there to help) Anyways, he got me the replacement and the gauge still didnt work!!
Turns out there was a short in the wiring harnes! The on thing I didnt think would be bad. The replacement Leo got me had a wiring harness also since it was a whole new gauge with everything, I put that one in and it all worked finally!

02-01-2008, 01:34 PM	#5
Shredder 2nd Gear Member Join Date: Sep 2007 Location: Posts: 224	RE: Gauges, and other things installed.. Fuel pressure gauge.. This one was kinda a pain, not to install, but for other reasons. You need an adapter to install this gauge also. This one cost me about $80, which is rediculous because its jsut a simple block of machined aluminum. You are going to hear "in hind sight" a lot because this was a huge learning process lol so, in hind sight, I would have picked a different one based on color alone. I got this one because I liked that it had 2 ports on it, and even came with the mechanical pressure gauge you see mounted to it. When I open my hood people tend to gravitate to that gauge. Anyways on the right of it you see the fuel pressure seding unit from the autometer gauge. The procedure I went thru was this. Remove the fuel delivery line, make sure you have plenty of paper towels handy, and your engine is cool! I didnt have enough paper towels ready and had to spend a lot of time soaking up the fuel that poured out when I popped off that line. I recomend just jamming paper towels all around the area, specially in the the valleys between the intake tubes. Remove the stock piece from the fuel rail by removing the two bolts (8mm I THINK, I should have written all this down when I was done that day) Insert the addapter and bolt it all back together. I believe the bolts needed to be tightened to 8ft lbs, and for the life of me I couldnt find a torque wrench that would go that low. I ended up finding one online.. so I basicly tightened it to close to what I thought was 8ft lbs, then re did it when I got the torque wrench.. I was damn close to 8ft lbs lol Here you can see the fuel pressure adaptrer and the place where i tapped the vacume line. I still have the wires exposed there.. After I first installed it, I put all the wires in those plastic looms. After I ran the wires to the gauges, the fuel pressure gauge would just stay pinned at 100 PSI! I tested the gauge with my multimeter and it seemed fine, pluged another sensor into it and it read correctly. I then tested the wires and saw that the sensor was sending a constant 4.75 volts, which is equivilent to 100 PSI. I figured the sending unit was bad. I talked to Leo at LTM Global and he was more than helpfull in getting me a replacement sending unit right away (its actually way more involved than that.. because I made another mistake and needed something else replaced, and Leo was right there to help) Anyways, he got me the replacement and the gauge still didnt work!! Turns out there was a short in the wiring harnes! The on thing I didnt think would be bad. The replacement Leo got me had a wiring harness also since it was a whole new gauge with everything, I put that one in and it all worked finally! __________________ 86 saleen 008 95 GT Conv (selling) 07 Gt conv, Saleen Supercharger, ford FRPP suspension, FR500 black chrome wheels, autometer gauges.