Engine/Transmission (1998.5 - 2002) fuel pressure gauge installation

[apat]

I am getting ready to install an Isspro electric fuel pressure gauge. Has anyone used the Vulcan universal fuel pressure line? It's supposed to attach directly to the Schrader valve on the VP-44. Is there any benefit to using a tapped banjo bolt?

 

[Geno's Garage]

As long as you remove the needle from the shrader valve then that will be the most simplistic install. Either way you will be tapped into the fuel system. Scott

 

[LTassone]

I just installed it last weekend it worked fine

 

[BDaugherty]

I prefer to use the tapped banjo bolt for its higher flow capability compared to the factory bolt. I've set up several stock or mild trucks using FASS DDRPs and high flow banjo bolts like these:

Banjo Bolts Cummins City Diesel - Diesel Performance.

They work well with the gauges and warning lights.

I have one of the Vulcan hoses, but I haven't used it yet. It looks like it would work well, I just haven't had occasion to use it.

 

[THoltz]

What exactly is a banjo bolt?

 

[rotohead]

The 'banjo' refers more to the shape of the fitting on the end of the fuel line. Look for that shape and a hollow bolt allowing fuel to pass thru. Changing those fittings out to AN or similar can aid in fuel flow esp if upgrading fuel line size or transfer pump.

 

[John_Barks]

I couldn't help but notice that there is no mention of using a snuber on the gauge in this thread. Since it is electric I am assuming it is a remote sender. My gauges are autometer so maybe that is the difference?

 

[THoltz]

The 'banjo' refers more to the shape of the fitting on the end of the fuel line. Look for that shape and a hollow bolt allowing fuel to pass thru. Changing those fittings out to AN or similar can aid in fuel flow esp if upgrading fuel line size or transfer pump.

Sounds like changing out the banjo bolts with larger ones would be a worthwhile mod and would be inexpensive. Which ones and how many need to be changed? It's a bit odd that with all the info on the stock lift pump & VP44 failures that a lot of guys aren't changing out their banjo bolts.



Anyhow, thanks for the info. I learn something every time I sign on to TDR.

 

[apat]

I just installed the same gauge. When I turned the truck on, the gauge pegged at 40 and did not move when I took it out for a test drive. I called Isspro and the engineer is out this week. Anyone had the same problem?

 

[DMcLeod]

One reason why I would not use the VP schrader valve to feed a gage, is when my isolator stuck, and the gage read 0psi, I quickly grabbed my test gage, and using the schrader valve, was able to determine there was a problem with the gage, and not the lift pump. For that reason, and the reasons already discussed, I prefer to feed the gage from a banjo bolt, and not the VP schrader valve. Of course, electrical gages never have problems, so you're probably fine... ...