Ok so first, yea, glowshift is cheap. I know it. Doesn't mean it shouldn't work right out of the box. The first sending unit I received had a rattle inside of it so that got thrown out. Second one seemed good. Probably should have taken it as a sign.

Products I ordered.

Gauge:
Blue Digital LED Fuel Pressure Gauge
Banjo Snubber:
Cummins banjo snubber for '98.5-'09 Turbo Diesel trucks.-Geno's Garage
Everything wired up w/ 18 gauge automotive grade wiring.


Sender Location:
I had my diesel mechanic install the sender on the bottom of the fuel filter housing w/ the banjo bolt above while doing a fuel filter change. So that about leaves the idiot factor out of messing up the banjo bolt and fitting. No fuel leaks. Wiring looks good. Fuel system bled properly. I also tested the wiring w/ a multi meter and obvious have continuity.


The problem:
I start the truck and read 5psi. (don't jump to conclusions yet) Mind you, I just bought this truck and the mechanic says it has the "lift pump conversion." So no in-tank LP is what I believe he said. Some dodge part b/c the original LP failed many moons ago. When I hit the gas the gauge reads 0psi. I have driven about 50 miles so far and if there was really honestly 0psi the truck wouldn't run. Plus, I had a volume check done and she is pumpin 170gph. Spec is 130gph and above. I believe I remember that right off the top of my head. I know I was pretty well over spec.

So other than saying its a bad sending unit, any ideas? Something I am missing. I did research and some people chose my location for a gauge and others put it right on the side of the vp44. Both are on the low pressure side according to the diesel mechanic and suitable locations. After all, only about 6" separate the two locations.

The Odd:
I am thinking it may be a problem w/ the snubber? But come on it's Genos. Anyways, the more I drove the thing, the higher the fuel pressure reading went. By the end of 50 miles I was up to 10psi, but under acceleration down to 1psi. Driving at about 5-7psi. It is odd how it only read a max of 5psi during my first drive, but subsequent longer drive got up to 10psi for a brief moment. Why do I think it is the snubber? B/c the snubber only screwed on about 50% of the way onto the sender. That leaves a good bit of area for air including any air already inside the sending unit itself. The snubber has only a pin hole for fuel to go through and so does the sending unit. I think maybe air is trapped between the sending unit and the snubber. Is that possible?

 

i ordered a glow shift one will be here monday i was thinking tapping into the top of the filter housing take the brass fitting off and go there ill let ya know whay i get.

 

Glowshift fuel pressue senders suck. All honesty you should remotely mount it away from the motor with like 3 feet of hose off the snubber. The starting pressure kills them quick.

 

That's why I have a snubber (see link in first post). Not the glowshift one but the Tek one. But honestly, the topic of snubbers is highly debated. Most say its only for a mechanical gauge. Either way, the Tek one should do good.

 

Even with a snubber, i had the problem where i kept ruining sending units from them even with a snubber. Solution i found is to mount the sending unit off from the motor and use a length of hose or tubing

 

Doh! Aight man that is good advice b/c I have a feeling they are going to want to send me another one. What did you do use a 1/8th NPT to barb then run a fuel line to another barb 1/8th NPT then to your gauge. Seems simple enough.

 

Id go with plastic hose with compression fittings. 1/8th inch both sides with plastic pressure rated hose. Just make sure you bleed fuel through the hose before attaching the sending unit.

 

dont mount senser close to heat sorce, every time i tow my glow shift sencer dies from to much heat!

 

My Glowshift FP reads 4psi even when it is truly 0psi with my test gauge. It is accurate above that as I have tested it with my test gauge. I just had my lift pump die and the gauge read 4psi but I shut it down knowing the truth that I was at zero psi in the real world. I agree that a product, although a little less in price, doesn't make it ok for it to be a POS.

 

the gauge i ordered is just a sensor with two wires to gauge should i run that one with a longer house i was thinking of tapping into the fuel filter top with the brass plug they have and going there.