Engine/Transmission (1998.5 - 2002) Fass dies low mileage

[DAWG-1]

Hey everyone,

Looking for some input on premature fass pump failures, any others out there. I only have 50,800 miles on my truck. I installed the Fass pump only (HPFP) back by the tank. I have only 13,000 miles on the pump . I installed the -08 fuel pick up, -08 with in line filter to the pump, -06 to the factory filter and the -06 from filter to the injection pump. I noticed a problem when I would accelerate thru the gears at a normal rate and my fuel pressure would drop to 5 psi. At idle I used to see 16-17 psi and I could accelerate hard and never drop below 10 psi. All fuel filters were changed as soon as I noticed the drop in fuel pressure. Sam.

 

[Curious Dave]

Take the pump apart and see what is going on.

 

[Crash&Burn]

What about the strainer before the pump?

 

[DAWG-1]

What about the strainer before the pump?

I changed out the filter strainer before the pump and the filter at the engine.

 

[monkeyman]

My Third FASS pump is about to go, I won't buy another!
Rick

 

[Curious Dave]

Monkeyman... What pumps have you been running and what did you do with them after they went out?

 

[monkeyman]

First pump had external brushes, that failed in one year. No warranty, this pump cost me $400. 00, and has been on about 90,000 miles. My business uses electric pumps that pump liquid 24/7, we have some over ten years old still running. However they can't make a motor last a tenth of that time.
Rick

 

[monkeyman]

PS: Threw old FASS pumps out, what good are they, looking at Air Dog now
Rick

 

[dresslered]

Stick with the Carter. Relocation to the rear is better than the stock. Just keep a couple under the rear seat.

 

[Curious Dave]

I had an external brush setup too. It lasted a few years. Then I went over to the lifetime unit. No problems.

I have heard of this problem before though.

I installed a return line at the injection pump. I can regulate IP feed pressure with a ball valve. It maintains 12 psi on -8 line. No problems.

 

[Midnite]

My external brush FASS has been working fine for about 6 years now. Noisy, but dead reliable. Of course, now that I say that it'll fail tomorrow--that's usually how things work, right?



Mike

 

[ALepley]

Is the fass pump installed correctly? Is the drain hole on the pump facing down. I have heard of people installing the pump upside down causing premature failure. Just an idea.

 

[DAWG-1]

The drain hole is pointed down. That is where I noticed diesel fuel leaking. Sam