electric fuel psi gauge or mechanical fuel psi gauge?

[NRussell]

Are you suppose to use electric fuel gauge with electric pump and mechanical fuel gauge with mechanical fuel pump? (i. e. glacier diesel fuel boss pump)???

 

[hsmith]

I've gone through two mechanical Isspro gauges on my 12 valve with the factory mechaical lift pump. Both leaked badly at the bezel. Gave up and am not worring about it, but my truck is not a sensitive to fuel problems as yours.

 

[Turbo1Ton]

Here's the basic way to look at it. A mechanical gauge has to be connected to the process fluid, in this case fuel. To do this safely and keep fuel out of the cab of the truck, it utilizes an isolator (a diaphragm) and a fill fluid (in a hose between the isolator and gauge) to transfer the pressure from the process fluid to the gauge. An electrical gauge uses a electric sending unit which takes the pressure reading, turns it into an electrical signal, sends it to the gauge, and displays the signal as a value on the gauge.



You can use either type gauge with either type pump.



I used to think poorly of electric gauges because I didn't trust the electronics. That was years ago. I still don't like the idea of electric gauges but with the fuel pressure gauge, I liked the idea of not having to use the isolator. Plus I had a friend that used a mechanical fuel pressure gauge and he said no matter what, his gauge would never drop back to 0. The isolator apparently held pressure on it or something.



Sorry, so long. Hope this helps.



Jeff

 

[NRussell]

Thanks Jeff I have an electric dipricol that just started to act up. It always stayed at 15-17 psi and Monday it went to twenty and yesterday it pegged to 30 psi. I called Danin and she said most likely it is the gauge. I checked the wiring and everything is ok, that's why danin said it was most likely the gauge. Geno's is going to replace it, but danin is 2 weeks out on shipping. I just wanted to know if electric or mechanical was better than one or the other. I will stay with the electric replacement. Thanks again

 

[moonranch]

I have an electric gauge pre-filter and a mechanical post filter. The mech gauge has been more reliable and doesn't "jump" around like the electric. And just recently the electric gauge won't read above 3psi even though the mech shows a steady 15. I think read that Quadzilla has a different sending unit, I should give them a call.

 

[Turbo1Ton]

Thanks Jeff I have an electric dipricol that just started to act up. It always stayed at 15-17 psi and Monday it went to twenty and yesterday it pegged to 30 psi. I called Danin and she said most likely it is the gauge. I checked the wiring and everything is ok, that's why danin said it was most likely the gauge. Geno's is going to replace it, but danin is 2 weeks out on shipping. I just wanted to know if electric or mechanical was better than one or the other. I will stay with the electric replacement. Thanks again

You said you checked the wiring so I assume that includes the ground. I had some gauges on an older truck that I lost a ground on and all of my gauges pegged. I never noticed them acting funny because I lost it quickly but if it were to slowly loosen, I could see it causing the gauge to creep up.



Good luck.



Jeff

 

[NRussell]

You said you checked the wiring so I assume that includes the ground. I had some gauges on an older truck that I lost a ground on and all of my gauges pegged. I never noticed them acting funny because I lost it quickly but if it were to slowly loosen, I could see it causing the gauge to creep up.



Good luck.



Jeff

yeah it is still fastened... all 5 gauges are connected to same ground location.