Engine/Transmission (1998.5 - 2002) FASS turning off & on

[stlowry]

I have a 150 GPH Fass that has started kicking off and on. I've been through all of the wiring and can't find a problem there. I'm wondering if it might be a motor / brushes issue. Anyone else have this problem?

 

[RAJohnson]

When you say turning off and on? How do you know this? By fuel pressure gauge or by sound? Or by the truck will die?

 

[GarrettPetersen]

I had a problem kind of like that with my FASS. found out that I had gotten water inside the moter on the pump. I pulled FASS system off dried the moter out siliconed the brush caps and reinstalled the system and its been workin fine. Just a thought seeins how its startin to git wet outside

 

[steved]

Almost sounds like the relay is going bad... you can get a new ice-cube relay at radio shack... for $5 might be a cheap diagnosis.



steved

 

[cpeters]

I had a simalar problem and it was the brushes.

 

[libertyram]

I have had a problem with brushes also. I just removed them and reinstalled them and it worked fine after that.

 

[steved]

Just FYI, the newer FASS motors don't have serviceable brushes... they are termed a "million mile" motor.



steved

 

[ToolManTimTaylor]

Wow I was going to say brushes as Mine was. The new ones ya can't play with the brushes?? That bites :{

 

[steved]

His might have brushes, but the new ones (I guess Oct 05 up) don't have serviceable brushes... I know, cause I got one... guess they redesigned the motor. There isn't anyway to take the new ones apart without complete disassembly.



It was just a FYI type of thing... up to now they all had brushes from what I gathered... the one I just got, I had to wait a few extra days to get because it has the new motor on it... which seems to work fine.



steved

 

[Gary - K7GLD]

Just FYI, the newer FASS motors don't have serviceable brushes... they are termed a "million mile" motor.



steved

AH! Sounds like the stock LP's DC fixed us up with... :-laf :-laf



They don't have "Carter" stamped on them anyplace, do they? :-laf

 

[steved]

AH! Sounds like the stock LP's DC fixed us up with... :-laf :-laf



They don't have "Carter" stamped on them anyplace, do they? :-laf

Not that I could see!



Like I said, so far so good... got about 750 miles on it o far with my only real complaint being 25psi at the CP3!



steved

 

[stlowry]

I did replace the relay just to rule that out. The reason I know that it was turning off and on was because the guage was bouncing back and forth and it would stay off for a min. then come back on then sometimes real fast on off on off. Then I pulled over and put my hand on the pump while watching the guage and sure enough it's the pump kicking on and off, not a guage problem. Then I got back on the road and it happened a few more times and then the problem went away, hasn't happened again. Changed the relay when I got home.