Is a FP gauge not worth installing...

[slowneasy]

Needing to order gauges for an '04. 5 and have been doing some reading on what is really a "need to have". Truck is a six speed. Is a FP gauge going to be helpful on this truck or would it be irrelevant?



Thanks!

 

[RDyson]

I don't think it is a need to have. But if you are going to be adding other "performance enhancers", it can be a great tool to use in monitoring how things are working. Knowing that you are pulling your fuel pressure down can help you understand whats going on if you start having problems. Plus, I just like knowing that my fuel pressure is OK.

 

[BothellDiesel]

I thought the same way awhile back, But now i'm installing one, an autometer electrical FP guage on the steering column. I consider it a must have and recommend it to all my buddies especially if you start bombing.

 

[RJOL]

It's not nearly as important as it was with the 2nd gens FP/VP44 problems but I still installed one on my 2005.



It is a relatively cheap mod (Westach/Geno's); it fits in well with my Westach boost/egt dual gauge and my two hole "mirror pod;" it will tell you if your pump fails or you get a contaminated batch of diesel; it will tell you if you need to replace the filter (i. e. a slow drop in FP). That's my story and I'm sticking to it...

 

[WCounts]

You have to have a guage to set your fuel pressure. I have mine at the fuel pressure regulator where I can look at it while I'm setting the pressure. The ones you mount in the cab are junk.

 

[WUnderwood]

I think they are pretty necessary; I am running a fuel pressure, boost, pyro, and transmission temp. Like one of the other guys said, you never know when you get a contaminated batch of fuel, and need to change your fuel filter. I think it is cheap insurance for the future if you are going to bomb the truck with chips, etc, that tax the cp3 and fuel pump



hope this helps

 

[RDyson]

You have to have a guage to set your fuel pressure. I have mine at the fuel pressure regulator where I can look at it while I'm setting the pressure. The ones you mount in the cab are junk.

Is your regulator and gauge under the hood? Makes it kind of hard to monitor the pressure while you are driving. Although I'm still running the stock pump, my pressure drops from 7. 5 at idle to 2 pounds at WOT.

As for the in cab gauges being junk, mine has worked great for a year. No problems at all.

 

[WCounts]

I have a bypass regulator mounted on the AirDog and the gauge is mounted on the regulator and can be seen between the cab and bed.

 

[RTillery]

I started reading about lift pump problems on the 3rd gens and decided to put a gauge on mine at about 48,000. I had 5psi cold at idle and I could pull it down awfully close to 0 when I gave her some fuel. I put a FassII 95 on a couple of days later. I idle at 17psi and can't pull it less than 15 wfo. I have the pressure pickup at the CP3 inlet. It has been steady as a rock for over 50,000.



My buddy has an 03 with a little over 100k on the stock pump, no problems. Your choice.

 

[Jack in Alaska]

Do the 2004. 5 models have the in tank pump or is it separate like the older trucks??

 

[Jeff_K]

I'd say a FP gauge is important... . https://www.turbodieselregister.com/forums/showthread.php?t=158479

 

[Mad Bomber]

Genos did a artical on having one. THEY NEED ONE!!!!

 

[cerberusiam]

Do the 2004. 5 models have the in tank pump or is it separate like the older trucks??

The in-tank pump started with the 05's. Unless it has been retrofitted the LP is on the filter housing.





As far as a FP gauge being needed, the CP3 works the same way as the VP44 when fuel volume is low. Injection event gets fed first then cooling and lube. Too much time at 0 psi and the pump will suffer.

 

[flyairam]

Just do the BD 5 PSI warning light install instead of a guage. It's simpler, takes up less space, cheaper, and tells you everything you need to know - is my fuel pressure high enough?



Mine is mounted right beside my boost/egt guage on the SR-T pillar mount. You can order them from BD, Genos, or several other places for around 50 bucks.



RAH out.

 

[RJOL]

... As far as a FP gauge being needed, the CP3 works the same way as the VP44 when fuel volume is low. Injection event gets fed first then cooling and lube. Too much time at 0 psi and the pump will suffer.

I'm trying to remember the details of the VP44 but I don't think they operate the same as the CP3. The VP44 would not pump fuel by itself (or at least not very well). When the LP failed, it would literally starve the VP44. The CP3 has an internal pump that, if primed, will supply enough fuel for the pump and injectors. If you have added hardware/software to increase your HP above stock, then you could have a problem with the CP3 not being able to keep up. If this is wrong I'm sure someone will correct me...

 

[slowneasy]

Wow! Everyone, thanks for the replies. You all convinced me to go with one. Now to get a set of gauges ordered sooner than later.

 

[Mad Bomber]

Here is good place to start to look. https://www.turbodieselregister.com...=redirect&id=5&URL=http://www.genosgarage.com