Where are you installing your fuel pressure gauge?

[Cat_Rebel]

I know I've seen it before but where are you'all tapping into to run a line to a gauge? Isn't it somewhere on the fuel/water seperater? I think I remember Barney had a simple one that sat up by his windshield.

 

[LCAM-01XA]

On the filter head you have the bleed valve, the vacuum switch for the fuel filter light on the dash, and the return line barb fitting, all of these are 1/8" NPT to my knowledge. I have no return lines on my truck, so that would be a good place for teh gauge supply hose for me. That, and I got two filter heads next to each other, so I got more fittings than I know what to do with, lol

 

[Cat_Rebel]

What is the most common type of gauge to use? I'm just trying to get a basic waterproof setup, nothing fancy & don't want to spend alot.

 

[Agnem]

Actually, their use here is not that prevalent. More popular on the PSD powered rigs. I still want to put one in, but haven't done it yet. I want one with an electric sender. Not mechanical.

 

[hesutton]

NEVER...........EVER..........PUT A MECHANICAL FUEL PRESSURE GAUGE IN THE CAB!!!!

It is illegal in most states and its foolish. The last thing you need is fuel being dumped into the cab of your truck as you are driving down the road. Mechanicals are cheap, electrical are not unfortunately.

I have an electrical Autometer and the sender is at the filter head. It is very informative and it has helpped me find problems sooner than I would have otherwise. I've had low pressure with fuel leaks and when my relay for the fuel pump took a dump (no pressure at all, but the truck ran fine at low RPM). My Holley puts a constant 3-5 psi at the filter head all day long.

Here are some photos of the gauges.

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Heath

 

[Cat_Rebel]

Yeah didn't plan to put it in the cab. My buddy had one under the hood of his PSD & it blew on him spraying fuel all over his engine. Only imagine how bad that would be in the cab.

 

[bluecoot]

What is the fuel pressure suppost to be after the ip.

 

[icanfixall]

For the turbo pumps its 2100 lbs after the pump. For non turbo motors its 1875lbs plus or minus 75lbs. Replace the injecters when they get down to 1450lbs. The pumps can push up to around 5000 lbs but I have never seen this deminstarted. I do know the pump will not last at higher pressures than what a turbo pump comes as. Mel will have more information on this..

 

[Agnem]

What is the fuel pressure suppost to be after the ip.

That's not something that your really going to be able to measure anyway. It's going to be regulated by the injector. To see the kind of presure Gary is talking about, you'd probably need a blocked injector which of course would only result in damage, since the fuel has to go somewhere.

Heath, how about a picture of where you put your sender? I need to do this to the Moose Truck.

 

[hesutton]

Heath, how about a picture of where you put your sender? I need to do this to the Moose Truck.

Well, I'll see what I can do after work.

Heath

 

[RLDSL]

Never say never if you want to use a mechanical fuel pressure gauge , there's no reason that you can't, you just need to install one of these critters It uses a different fluid on the other side of the isolator to push the gauge so you don't have anything nasty or combustable spraying around inside in the event of a leak. THose things are required in many race classes for mechanical oil and fuel pressure gauges. THey aren't cheap, but some folks like the accuracy over the stabilized electric sender jobs.

 

[LCAM-01XA]

Yeah didn't plan to put it in the cab. My buddy had one under the hood of his PSD & it blew on him spraying fuel all over his engine. Only imagine how bad that would be in the cab.

Dumb question, but if you ain't gonna look at it, why don't you just screw the gauge directly in the filter head? Most gauges have 1/8"NPT male fittings, and the filter head has 1/8"NPT female ports. I'm pulling one of my vacuum switches off and plugging the gauge there, cause those ports are at the very corner of the filter head and will require no extension for the gauge to clear the flange for the filter below. Now just to find me a nice liquid-filled gauge, I used a non-liquid gauge in my old Chevy and that needle would be vibrating pretty good cause of the idle quality (or the lack thereof), can't imagine how bad this can get on a diesel.

 

[Cat_Rebel]

Dumb question, but if you ain't gonna look at it, why don't you just screw the gauge directly in the filter head?

I just said I didn't want it in the cab never said anything about outside.