fuel pressure gauge installation question

[RedD250]

Can sombody take a picture of the correct place to install a fuel pressure gauge sensor on the VE pump trucks? There are 2 different banjo bolts after the fuel filter that I can see. I have had nothing but problems with my fuel pressure gauge since I put it on, and I'm thinking that maybe I have it in the wrong place. The pressure bounces around wildly at idle, then smooths out under load, usually. Sometimes it bounces around under load too. I've replaced my snubber valve, sensor, wiring harness, gauge, and lift pump and it still does it. It's worse with the new lift pump. Instead of bouncing around by 1 PSI, it bounces around by as much as 4. Do these trucks just have irregular fuel pressure? Thanks.

 

[BigPapa]

The pressure pulses with each stroke of the plunger. A Fuel Pressure gauge is really not a necessity on a VE or P-pump truck. I never had one.

 

[NIsaacs]

The way I understand it, some sensors/gauges might need a "wet" sensor for fuel pressure and a "dry" sensor for manifold pressure, as an example. It may or may not apply for you.

I would also add about 2' of rubber hose between the fuel pressure port and the sensor. It might help with fuel pulse. It will require a ground wire attached to the sensor and negative battery post.

 

[Ozymandias]

The pressure pulses with each stroke of the plunger. A Fuel Pressure gauge is really not a necessity on a VE or P-pump truck. I never had one.

This. No way you can smooth out that needle on a "piston" pump. That's not how it works.
As a side note, that's the reason why a CP3 commonrail pump is phased with the injection event.
So the pump stroke falls, more or less together with the injection event.

 

[cerberusiam]

Add a needle valve between the fuel source and the gauge, close the needle valve until you as much bounce out the needle as possible and it will still go to zero when pressure is removed. With a manual gauge you will likely never get it to be completely stationary on the gauge, a electronic sensor and gauge that allows to control sensitivity and sampling rate will be pretty steady.

 

[RedD250]

Thanks for the input. If it's normal I'm OK with it. I was just concerned that I might have some other problem with the fuel system.