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This is my first time reaching out to a forum for help. So please be patient with me. My 2001 Dodge has me stumped. Sorry about being long winded. My truck right now so underpowered it is unusable. 2 years ago noticed a significant loss of power. The truck threw the VP44 code. I bought a remanufactured VP44 from alligator performance in ID & changed out the lift pump. I put on about 100 miles and everything appears normal. I then loaned my tuck to a friend to tow some stuff about 800 miles. During his trip, he received a stellar deal on some fuel from Mexico. From looking at the fuel filters I guessing it was mud mixed with a little diesel. After suspect fill up he tows about 300 miles and calls me reports huge loss of power. He also tells me about his huge score of cheap suspect diesel but everything will be okay that filter will clean it and the truck has a water sensor. At the time I thought he was just pulling my leg. 100 miles later, he calls me to tell me the truck has been sputtering for the last 30 miles the AC quit working and now the truck died. When on the phone he tries to start the truck. It starts. I asked him to check the fuel filter. He tells me he is running late and cannot afford the time to check the filter. Against my instructions, he drives the truck with empty trailer another 200 miles. When I get the truck back, I check the fuel filter. It is covered in mud & slime. I drain the little remaining diesel that’s left in the truck. It looks like muddy water. The next 100 miles I go through 4 more fuel filters. Then the filters stop plugging up and everything appears to be normal. Might be important.. ***Loss of power noticed when I get the truck back*** I don’t know if the truck overheated. It was outside Phoenix in the summer where it just died on my former friend. The truck is all stock except for gages and lift pump. I did not have gages on the truck when my friend used it. No oil in water or water in oil. No consumption of fluids. The motor has 200100 miles. Tested turbo system to 19 LBS and its good. No leaks in the intercooler or boots. When I stomp on the gas the truck the lift pump is still pushing out 10#. I think the EGT’s get a little hotter than they should be. The truck will drive empty at 75. If you put any load behind it it’s only doing 45-50 if I’m lucky. 12,000# trailer up a hill outside St George the truck would only do 12MPH. In the past same hill same load it would do 40MPH no problems. Truck starts up and runs fine. Running down the freeway occasionally it will seem like a miss for a half a second then it’s back to running normal. I think that there is a slight difference in motor sound now vs before. It seems to be using much more fuel than before. However when I get on it there is no tail tail black smoke from the exhaust. The cruise control just recently quit working. If that helps troubleshoot anything. I’m looking for ideas.