I have a 97 Powerstroke, the other morning with the windchill around -8 below and driving home my fuel filter light came on and my motor started loosing power as if it was running out of fuel. I switched tanks and it started back up and took off, thinking maybe it was my sending unit because the previous owner had problems with it I switched it back to the original tank to test it and immediately it lost power as if no fuel like before so I switched back to the second tank and it wouldn’t start just roll over and sputter as if wanting to start. I figured my fuel jelled up so the next day I added 911 to the fuel bowl which was not froze and filter looked good and added 911 to the two tanks plus Howes diesel treatment and all it did was sputter...temp was above freezing and windchill above 0. I let it sit for a couple days of warmth, the temp was above 50 with sunshine and went back to see if it would start and it just sputtered, by that time I had to put jumper cables on it. What could be my problem?