I've had my truck gelled up 2 times in the past 5yrs, both times occurred after I installed my FASS (just the pump). One time it took 2-3 quarts of 911 and 6 fuel filters (5 F), the other time 1 quart of 911 and 2 filters(-20 F). My truck sits outside all of the time (plugged in), and both times the truck started fine but died within 2-3 minutes. Once it died, I replaced the filter, dumped some 911 in the filter housing, bumped the ignition to cycle the fuel pump, and used something to hold the valve core open on the schrader valve on the VP44 (a smaller allen wrench works well) until all of the air is out and a good stream of fuel is flowing. The truck will always start after that, then I wait and see how long it runs. If it dies again, repeat procedure until truck runs and has power.
Both times this happened, there was 1/4 inch of honey like crap on each pleat of the filter. It was most likely from some bad soy diesel. The crap did not dissolve or dissappear after warmed to room temp. The truck would have never run without replacing these filters.
I run powerservice (white bottle) year round, twice the recommended dose in the winter, regardless of fuel blend. I had it in both times the truck gelled on me too. I talked to their tech people both times, and they treated me very well. They figured I got into too much soy diesel or one hell of a lot of water.
I always keep 2-3 fuel filters in my truck with at least a quart of 911 and the equipment needed to replace said filter. You never know when your are going to get into some crap fuel. Same reason nearly every semi truck on the road has 2 extra fuel filters in it somewhere.
FWIW
Matt