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Junior Member
20 Posts
Discussion Starter #1
Recently I took a snowmobile trip from mass to Maine. Had a half tank of fuel. Left the house at 4am and filled the tank added about 16oz of power service. Picked up buddy and hit the road at 11 degrees. Drove two and half hours and truck died in auburn Maine. It was 4 degrees there. I was able to limp to Napa and got filters and 911. Took filters out, no gel at all. Not like last year when frame filter was packed. Napa has cheap filters without the flange and oring to go into pickup pump so I did not use them. Filters looked fine. Truck kept dying and upper engine filter housing would be empty. Throw in a pickup pump. Still same problem. Go to advanced auto parts. They had the proper filters. Changed filters and 911. Got truck running and although now skipping because an injector was likely damaged by the no fuel situation. The guy at advanced was a ford tech and says he has seen similar problem that he thinks it was gel in the tank that clogged the pickup sock. But why would there be none in the filters if it was cold enough to be in the tank? My filter was packed last year when it gelled.

I guess my question is how could the tank be gelled but not the filters?
I believe that power plus diesel additive is garbage since my truck gelled up on it twice.
Is there anyone who makes a fuel system heater or filter housing heater or in tank heater for these trucks? I have found very little google searching. Only bd diesel housing heater but I don’t think it’s built to go into the factory 60 housing.
I have switched to howes diesel treatment but would like to add a heater if possible. My old 7.3 never gelled with the filter housing heater. Why do they not use a heater on the 6.0?
Thanks in advance for any info!

Senior Member
3,051 Posts
Early 6.0L like my 03' model came with a fuel heater in the frame rail fuel filter unit or as its called the hfcm (horizontal fuel conditioning module). I treat my fuel early on at the onset of winter using double doses of Stanadyne performance formula. I have never gelled even in sub zero conditions like -20F. I also run a fuel pressure gauge tapped into my secondary fuel filter bowl so I can monitor actual fuel pressure while driving, must be above 55psi, mine maintains 70-75 psi with the blue spring mod in the pressure regulator.

Later model 6.0L, like mid 04' and newer, Ford stopped installing the fuel heater in the hfcm. This makes these models more susceptible to fuel issues.

Treating the fuel early on before the cold hits is key, treating untreated fuel after it's already cold is not as effective, unless done indoors.

Diesel fuel in different regions is treated differently, there is no set standard, so you really don't know what the treated level is coming out of the pump in most cases.

One key when refueling to watch for is, if the fuel is pumping very slowly out of the pump nozzle, then likely the filter in the fuel station pump is clogging-waxing already because the fuel is not treated properly. Go to a station that the pump nozzle is flowing strong.

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