Water in Fuel

[Mohawk Dave]

Hey SS,

I forged a river last weekend, and on the way back my WATER IN FUEL light started blinking then stayed on. I could not repair that night due to circumstances, so I added the rest of my Stanadyne bottle to it, (for lubrication). The following day on the way home, with the light still on, the truck died while driving. I cranked it over and it wanted to start when pumping the skinny pedal, but it wouldn't.

Tomorrow I will drain the tank, remove the filter, pressure blow the line fuel back into the tank to drain and replace with new filter and new fuel, Diesel 911 for water and Stanadyne.

If you were a betting man, would you say the IP was damaged? Is there any other steps I should take? Anything I am missing?

Thanks in advance,

Dave

 

[Recovry4x4]

I doubt that the pump was damaged. Do as you indicated and have some really good batteies standing by at start time. The 6.2 is not quite as easy to purge as a multifuel.

 

[Floridianson]

Does the cucv have a drain at the bottom of the filter. Seem like as soon as the light comes on you would drain the filter?

 

[doghead]

Yes it does, and the procedure to drain it is listed in the -10TM.

 

[Westech]

Why would you not drain the Fuel filter first? it takes about one min to do. I take it you did not know your truck had a fuel drain and if I a betting man did not read the TM or manuals.....

 

[lindyp38]

im going to do that as a precaution.....

just a thought....do u normally keep the fuel tank filled to full....?

if the cap is on....how would fuel enter the tank?

is it vented.....?

 

[hotdogs151a2]

The fording operation and the "water in fuel" light may not have anything to do with each other. A dirty fuel filter will get the same "water in fuel" light. I would change the fuel filter first.
Thanks, Hotdog

 

[Mohawk Dave]

Hey guys,


Thanks, I forget to state that i did drain the fuel filter several times in the course of trying to get back home. And Westech, with MUCH respect, I have fully read and comprehend the TMs. I have printed them out-the M1009 pertinent areas- and carry them in the truck in a 3-ring binder. (We should've bet lol)

The fuel filter is new as of 3/11/11. I have done an extreme amount of PM on this truck and it is, I believe, in top-notch shape. Everything from the electrical to the mechanical-and all of it due to the superabundance of info on this great site.

Ok, I will do the afore-mentioned tasks and will let you know the outcome.

Thanks again guys and best wishes,

Dave

 

[Mohawk Dave]

im going to do that as a precaution.....

just a thought....do u normally keep the fuel tank filled to full....?

if the cap is on....how would fuel enter the tank?

is it vented.....?

Lindy,

I keep the tank full, I pulled the tank last month when I got the vehicle to weld a drain plug in it-b/c it had a hole punched in it- and when reinstalled I plumbed new fuel filler and vent line. All connections are tight.We are scratching our head as well as how water could have been exposed to the fuel. The water line was above the filler neck, which means it was above the vent, but it seems that a lot of water entered in a short amount of time- we're talking 3-5 seconds as I was pushing through the river, so there was no time for it to just sit and transfer into the tank.

I am not an avid river-forger, nor do I beleive in submerging vehicles, but given the circumstances we came to that day, I had two choices- turn around and not complete the trail, which we were almost finished with, or continue with the group. We know what I chose.

Best wishes,

Dave

 

[Westech]

Well that is a VERY smart thing you keep the TM on you. You never know when you will need them. If all your lines were new and tight there are not too many places where water can get in and really if you were only under for a very short amount of time. The CUCV fuel cap is NOT vented. I would check there to see if there is a crack or bad seal. That is about the only place where water is able to poor in that fast and in a large amount. Worst comes to worse just remove the red wire from the injection pump, open the fuel bleeder and crank away till you pump out the water. It will not take long to remove a couple gallons if needed. Change the filter after you get clean diesel and fire her up.

 

[kapnklug]

If the fuel cap is not vented, and the tank is not vented, how does the pressure equalize as fuel is consumed?

 

[Westech]

Magic