I've done 3 in the last 2 years

my third seems to be going out

I started the truck and walked around to read the under-hood gauge

right as I get to it (15 seconds after fire), it pops from 15 down to around 6

I assume im at 2 - 3 at WOT

Any ideas or just change the pump and keep after it

 

could be a variety of things, like a plugged fuel filter, plugged pickup screen, bad voltage at the lp.

 

its hard to say,I have one truck thats gone through a few of them, and I just installed a Fass on it .and my 01 HO I install 1 at 95,000 .
One thing I have seen happen is when the grid heaters kick on my fuel pres.will drop to half and go right back up as soon as they shut off...So it could well be a electrical issue causing the failures. just my .02

 

They're throw aways. Before I went to FASS, I was designing a set up that you could just unhook two quick couplings, a wire, and a thumb screw and change one out in about five minutes.

 

You could make a killing selling that kit.

The reason they are dying so fast is because you are driving the truck. Stop driving the truck and they'll last longer. I strongly recommend going to a different pump system.

 

I just had my 5th pump replaced in 2 1/2 years. I would've gone with the fass but they were on back order and my psi was down to 2.

 

Is it possible we have a non-venting issue instead of a LP problem? If a pump tries to suck from a slow or non vented tank it will quickly shorten the life of a vane type pump. Diaphram pumps like on gas rigs just collapse the tank. I think the LP problems we are having is due to air not getting in and letting the fuel out.
What do you guys think?

 

it sure could be part of it, it kills the chevys, the pickup screen in the dodge sux it grabs all the stuff in the tank and is a pain to service. the pumps them selves are cheap, clearances are sloppy and materials are not the best.....but, I have had great luck with the carters, I run big lines and a pusher, lost the pickup screen and all is well now. I think the vent and the pickup are two issues that are not properly addressed often enough

 

It could be very bad voltages that are causing the failures. As mine has gone through 6 to date. If anyone can get an osocilloscope readings this will be a great help for more info. Think that there are alot of probloms with these trucks that they know about. By chance, does yours sound tinny if you have and ear for sounds.???????

Thanks just have some ideas

Sorry you non informed comments won't help this problem.

 

I bet the ball in the relief valve is hanging up, good pressure then all of a sudden it drops like a stone.

Replace the pump as it will be giving you 0 psi when your on it.

I had a guage under the hood too, needless to say its in the cab now just for this reason.

 

Spend the $69 for GEno's relocation kit. It boosted my pressure and can't get it under 5 psi up a hil, pulling load at WOT. I'm impressed so far.

There is another alternative pump that has close to the same specs but $170.00

Aeromotive 11203 Specs
Fuel flow exceeds 900 lbs. per hour @ 13.5 Volts -more than 150 gallons per hour.
Pump provides 18-20 PSI fuel pressure - perfect for high-G leaving cars.
Pumping mechanism features our proprietary composite rotor, stainless steel vanes, and precious ground, heat-treated steel plates.
3/8" NPT ports facilitate easy installation.
Alcohol compatible.
Ideal for dedicated nitrous fuel delivery.
Low amperage draw.

 

after installing a diesel dynamics pusher pump kit{ runs in conjunction with the factory lp} have not had a problem. going on 40,000 miles ago.
if your pressure is way down dont drive the truck as you will kill the vp44.
this is alot more expensive of a problem.

good luck.