FASS II Quit running - need advice?

[JMerola]

Started the truck after leaving work yesterday, ready to depart the garage and noticed the FP gauge at zero. Shut it down. Cycled the key several times, no FASS humm, FP gauge still at zero. Get out, briefly check the connections - look OK. Reattempt start, no FP.



Decided to leave the truck in the garage at work and have my wife come get me (yeah, she was real happy).



The obvious question is what now. Can I drive the truck home (20 min highway from work) without doing damage to the CP3? How should I approach the pump problem?



Any input is appreciated. Really don't want to have the truck towed unless necessary. However, hard to do any significant diagnostic or repair work in a 5 story parking garage.



Thanks,



- Jason

 

[lmills]

I wouldn't try running it home with the pump dead. You'll have to try pull the fuel thru it if you do.

 

[RobertP]

if you have the stuff for your stock in tank pump handy you can hook that up until you figure out what is going on wih the fass pump.

i would check the fuses also.

 

[jwilliams3]

Did you try tapping the pump motor?

Mine did this over the winter on the real cold mornings so I suspect some electrical short somewhere in the system.

 

[JMerola]

I haven't tapped the motor yet. I will try that this afternoon. I have one of the earlier 'brushed' pumps, wonder if the brushes are spent.



Thanks for the advice,



- Jason

 

[MFalkinham]

Probably a stuck brush. Not uncommon for the FASS systems. Try pulling the brush access covers to see what's going on.

 

[Mark Craig]

JMerola,



Most likely a stuck brush, by the way they have an upgrade program for the older pumps if you want to consider getting it.



Mark @ DPPI

 

[staarma]

Why wouldn't you just take a test light to the power wire to the pump before starting out on a chase?

 

[Gary - K7GLD]

Why wouldn't you just take a test light to the power wire to the pump before starting out on a chase?

AH!



You mean, sorta like making sure there's fuel in the tank when the engine stalls along the road, instead of just tearing the engine apart to find the problem? :-laf :-laf



Some folks are just too logical! :-laf

 

[staarma]

That's about identical to what I was thinking. Even though it is probably a stuck brush. :-laf

 

[LowFly]

Got 2 options here..... first give me your SN.



1st option:



Clean the brushes. Get some 3M scotch bright pad, and pull the brushes out of the recesses. Polish the silver cap on the end of the spring until it shines. Buff the brush contact to make sure its all a uniform color. Look for any broken springs. If the spring is broken, a new set of brushes will be needed. (BU-1001 is the part number). If all looks good on the brush, take a small strip of the cleaning pad and thread it down in to the brush recess in the motor. (you can also pull the motor/T-block off the FASS base and use a cordless drill to help with this... . just put the strip in the keyless chuck and hone in both directions) Hone the best you can to get the contacts in the motor super clean and corrosion free. (This is where most people skip and see issues down the road). Once you feel that this is clean, reinstall the brushes and put some silicon on the brush caps to seal out moisture. Don’t over tighten. They can brake easy.



Options Number #2:



We have a motor update going on right now. Contact any dealer about getting this done... i also have a post on TDR about this... . Do a search for "Motor Update FASS". I would pull it for you... but my time is tight right now. Hope this helps.

 

[BIG BOB]

One Word!

MITUSA!