I have one of the older FASS units that mounts on the frame right in front of the fuel tank. Has anyone out there gone to the trouble to plumb in the heater lines to the unit, and if so, does it do any good in this -15F weather I am experiencing? I am having low fuel pressure warnings going off on initial startup, even with the block heater plugged in, 1/2 #1 fuel, and Power Service treatment supposedly down to -40F. Warning light goes out after about 10 minutes of high idle, but I don't like it....

 

never heard of it being done but dont see why it isnt possible. might look into racor products to see if they have something you need.

 

I know it can be done, the plumbing is in place on the FASS, the question is, is it worth messing with? Another question, anyone have tank heaters on their Dodges like are on semis? Do they exist....?

 

Wow. Someone out there must have messed with this idea at some point, feedback is appreciated!

 

First - never depend on the low fuel pressure light - get yourself a mechanical guage so you can actually know whats going on.

I dont see how plumbing antifreeze to the FASS is going to help you on a cold start.

Are you having problems with gelled fuel? If so, Id try to buy from a different station.

 

the heater on the line woulnt help much if your moving 150 gph through it. iv got a tank heater on my pete. riged up like a block heater so i have 2 plug ins now and its been great. just never seen it done on a cummins

 

my father's fass is plumbed like that. on initial startup it won't help because the coolant is cold. even with the coolant plumbed to the FASS it has still gelled up on him.

 

I'm curious what the proper way to plumb it is, a mechanic told me to put a tee on both of the hoses coming from the heater core, but my never ending thought process tells me to just cut 1 of the lines (preferably the one coming from the heater core as opposed to the one going to it) and put a 90 degree fitting on both sides and head back to the FASS with some heater hose. If you tee into both of the heater lines I don't believe it'll create a full circuit? Anyone with me on this?

 

t-ed into both lines you are creating a parallel circuit and you will get little to no flow thru the fass or the heater.
in series like yor said is best.