Engine/Transmission (1998.5 - 2002) Fass Owners Read This

[KBalzuweit]

Just had to share this.



I just changed my filter on my FASS. Started truck it ran a minute and died!! Just like a lift pump failure. Thought the fass died. Started checking and found the inline fuse had corroded and was not letting power through. So how long have I been running with no pump?? Have I damaged my VP? Well who knows. So guys check that fuse if you live in the north especially, my guess is the salt got in and that was that. So much for a weather proof fuse holder. KARL

 

[ceastmen]

Gauges& Di-electric grease

I had problems with my fuse getting corroded. Brad recommended using Di-electric grease in the fuse holder. Get a fuel pressure gauge, then there will

be no question if it is working or not.

Chuck

 

[KBalzuweit]

Gauges are in the works now. My thought is to eliminate the fuse down there and put it up in the engine compartment. Just keep it out of the salt spray. Just hope the vp is not hurt. Karl

 

[PCarbonaro]

Thanks for the warning; good advice.

 

[tractorface]

Move the fuse

Relocate the fuse to the engine compartment and upgrade the wiring harness while you at it. I detailed my fix for the same problem you had in an earlier thread. Just do a search. Lots of guys posted good ideas. Let me know if you need help sourcing the connectors.

 

[Wiredawg]

I moved the fuse anyway!

I always locate the fuse at the power source and not at the component. And I put dielectric grease on all connections as well.



Wiredawg

 

[GIT-R-DONE]

Here is something else that happened along the same line... .



https://www.turbodieselregister.com/forums/showthread.php?t=125181&highlight=FASS+fuse



I do believe that the FASS people have corrected this now, I know I am glad I checked mine before winter was over.....

As far as the pump, I believe if the FASS isn't running, neither is your truck. I doubt you hurt anything. JMO

 

[BWillard]

Mine ran for two days without the FASS running! The VP WILL pull enough fuel to run the truck but not enough to lubricate the VP and run the truck.



BTW, that was about three months ago and I just ordered a new VP!

 

[GIT-R-DONE]

Mine ran for two days without the FASS running! The VP WILL pull enough fuel to run the truck but not enough to lubricate the VP and run the truck.



BTW, that was about three months ago and I just ordered a new VP!

In a quest for more info, can you elaborate more on this? Like, if I go out and pull the fuse on my FASS, the truck will still start? No loss of FP on the gauge? Not flaming here, just want to know what to look for in case something like that ever does happen. I would have thought if it didn't work , the truck wouldn't run.

 

[Scrappy]

BWillard is right, that is why most people don't know the lift pump is dead until they change their fuel filter or the VP gives up all together.

 

[tractorface]

Your truck will run with the FASS fuse pulled. You will not see pressure on the fuel gauge, if you have the correct gauge you would see vacuum.



I purchased a fuel manifold on line for $10. Aluminum 3/8" in and out with 1/8" ports along the top. Am going to install my pressure gauge sender, a pressure switch, mechanical gauge, and a temperature gauge sender. The pressure switch will be wired to an alarm light and horn in the truck and let me know when the pressure drops below 10psi or whatever I adjust it to. That way I do not need to stare at the gauge all the time. I want to use the temperature gauge because I am curious about inlet temps and am going to install my fuel heater lines soon. The mechanical gauge will let me check the accuracy of my electrical gauge. The fifth and final port on my manifold will be left blank until my Paranoia once again consumes me and I need some other type of fuel monitoring device :-laf

 

[GKinney]

Tractorface,,, I like your idea on installing a temperature sender in the fuel flow. That will be very helpful on monitoring the fuel temps that the VP44 is seeing and how well the fuel is staying cool. I have wanted to find an adapter fitting that I could install in the VP44 fuel inlet to monitor the fuel temps right at the pump cavity, but never found one yet. Let me know how it works out when you get it all hooked up. Good Luck