lift pump gauge help!!!
 

ok i ordered a gauge kit but my truck already has a warning light that i think the previous owner said didnt work not really sure bad memory,anyway there is a line thet runes from the bottom of my filter assuming its a tapped banjo bolt. it has what looks like a cylindrical sending unit with a black plastic elbow with a wire coming out of it that is cut. the unit looks like it says p designs on it. does anybody know anything about this and could i hook my new gauge to it? as much help as possible would be greatly appreciated as i am starting a new job about 3 hours away and wanna get the gauge on asap.

that should be the pressure switch for the low fuel pressure warning light. You can install the new guage off the tappen banjo bolt and just too off for the presusre switch if you want to keep the light. But like the PO said, the light doesnt work. If you dont have the equipment and know-how to test the low fuel pressure light, throw the thing in the garbage.

can i use the unit that is already on the fuel line for my gauge? or not use it at all i dont want the light,but if i could use the hardware thats already there that would save me some work. i have a picture up now too.

No you remove that. From what I can see, that is the switch to activate the light.

from that hose run fuel to youre gauge in the cab or to your isolator or electrical sender.

ok thanks much appreciated.

Dont forget a needle valve (just open a hair) to dampen the pulses from the VP-44.

yeah got the needle valve and all hooked up so far so good idle at about 18lbs and and a good drive only dropped to about 14lbs so i can rest easy till i upgrade the fuel system.and some advise for people going to do this order the needle valve because there hard to track down i had to buy a 1/4 inch female by 1/4 male and reduce it down bought the valve at grainger and the reducer bushings at lows. not fun order the right pars the first time around.and thanks to all for the help.