FASS owners Heads Up

[tractorface]

The RASP guys are gonna love this.

Leaving the Home Depot with an overloaded trailer full of Drywall I glanced at my pressure gauge and no fuel pressure . I quickly discovered the fuse located inches from the pump was disfigured and no longer conducting electricity (blown). Seems the excessive road salt provided by Maryland’s huge tax burden got under the rubber lid and caused severe corrosion and a generally poor connection at the fuse holder.

I am going to change the style of fuse holder at my pump to something more worthy of the harsh environment. I am also going to work on the relay mounted under the hood as I see that as the next point of failure. Anyone ever use the spare spots in the factory fuse/relay box under the Hood? That would be a great solution.



I suggest all FASS Owners check the connection at the fuse under the truck, a little dielectic grease will go along way towards eliminating the problem I had. Lastly I am installing a low pressure warning switch and wiring the output to my no longer used “Water in fuel” harness under the hood. This will alert me via dash chime and Water in Fuel light if I loose pressure again. Like anything else the FASS needs some general maintenance to keep it working properly. We cut on DC a lot but the electric wiring we add is sometimes far more troublesome than what they have done. Lesson learned and I will be “Bulletproofing” my FASS wiring shortly. (also going to use 12ga. Wiring to the pump to keep voltage drop to a minimum, as I have access to the Deutsch connectors at work)



See Ya

 

[SRadke]

Inline fuses should be as close to your power supply as possible. That's just a safeguard agenst something rubbing through the wire along the way. I suggest moving the fuse up near the battery. My $. 02



-Scott

 

[tractorface]

I agree. There is a fuse at the power supply as well. To be honest the fuse at the FASS could probably be eliminated without compromising the safety of the motor.

Good point



I suspect the Fuse at the FASS was installed by the manufacturer in case some lesser installer deleted the fuse at the power supply.

 

[2Farr]

I had the same thing happen to me yesterday on my way to work. My fuse had corroded and burned up the harness. I rebuilt the harness and replaced the fuse with a water proof type that we use on aircraft. I put the fuse near the relay.

I agree every that runs a fass should look at the harness and the fuse very close.

 

[BWillard]

My relay shorted out 5 months after I installed my FASS (not weather related) and I drove around with NO fuel pressure for 2 days Of course I thought "atleast I know it's not the FASS"



Now I always carry a spare relay and fuse!

 

[GIT-R-DONE]

I had the same thing happen to me yesterday on my way to work. My fuse had corroded and burned up the harness. I rebuilt the harness and replaced the fuse with a water proof type that we use on aircraft. I put the fuse near the relay.

I agree every that runs a fass should look at the harness and the fuse very close.

I took your advice, and well and behold, the fuse was corroded. Pulled it out, cleaned it up and used the dielectric grease on it. Thanks as this probably just saved me sitting along the road somewhere wondering what the problem was. Also, put a spare 15 fuse in the factory fuse box, in case I ever need it. Got to checking around in the factory fuse box, ( under the hood ) and there is like no spare fuses in there to use, going to have to change that. Thanks again.

 

[JCyrbok]

Been doing alot of research on the FASS as a replacement for my LP's that always fail. Got ahold of DPP and asked abunch of questions, one of which was in regards to the fuse situtation. They advised at as of aprox 1 month ago the wireharness has been updated with weatherproof fuse holder to ease the fuse problem.



ALso the brushes on the motor now have o-rings in their mounting holes to keep them water tight and corrosion resistant.



J-

 

[kkmckinney]

I would check out the BD Auxilary lift pump that has been around for a long time and comes in a Kit with everything you need. I had mine installed in Bishop for $450 for the pump and labor. BD is on the Internet and has been around for a long time as a Diesel Performace Company.

KEN

 

[tractorface]

I really like the way DPP seems to listen to its FASS users and continually updates the product. I am glad I bought a FASS instead of an Air DOG. Custom filters are no way to go