I was replacing my fuel filters & found the lower cavity full of Vaseline
looking sludge.
It was Terrible ........ but no water at all
I've kept it drained regularily.

The Secondary upper Filter was clean as a Pin ... as was the "Inside" of the lower primary filter.

I removed both fuel & return lines (temporarily plugged the tank lines with 3/8 & 1/2" bolts),
both wiring harnesses & finally the whole Lower Assembly.

I removed the side cover that has the 4 hose connections, to clean all this crap out with carb cleaner.

A Filter drain / change would have NEVER got this crud out.

Is this the proper way to do this ?? Seems it woulda been too aggrivating to do ON the truck without removing it ...

Would a Fuel Additive prevent this ??

My truck has 66,000 miles on it.

Is that a Pump inside the lower filter ??

Any info appreciated

 

After a little research, I found this article from an old post by Senix

DTS Articles - Fuel Coagulation

 

Easiest way to do it is completely take it out from under the truck. You will need a new gasket for the front cover/manifold. Additives won't fix that. Yes the low pressure pump is in the housing.

 

bio fuel and lint growing from bacteria. no real cure other then good fuel and not letting the truck sit

 

Glad you got it cleaned out and checked the fuel bowl real good. Likely well did save yourself from problems down the road.