Then you had best be getting one before you go doctoring around on the engine "in the blind".

My fuel-pressure gauges are the most looked at gauges I have.

 

I would be interested in seeing how your fuel pressure gauge is plumbed in.

 

Very simple.

I got rid of all the hard lines and replaced with rubber.

In the line between the fuel-filter and injector-pump, I installed a TEE that is hose-barbed into the fuel line and has a 1/8-NPT port on the TEE.

Into this port I first screwed a male-female ball-cut-off valve, then a "air and other gases" snubber, then the gauge-line that proceeds through the fire-wall and to the dash-mounted gauge.

A second gauge is laying on the bench that will go in the rubber line ahead of the filter; this one will probably remain under the hood; but then, I might change my mind and put it in the cab also.


On the rest of my fleet, I have temporarily installed the GENO's large-head tapped banjo-bolt, then added everything already listed above.

Every necessary metric adapter, JIC fitting, line, etc., is sorted, grouped, and bagged, one bag per truck, and awaiting time for me to install the piston-lift-pumps and convert them also to rubber lines.

 

Helps keep you from breaking the pump.