I thought I had this figured out but I guess not and we need to hit the road this weekend towing a trailer...My 99 f350 started chuggn and you could hear the injectors rattling when I needed to accelerate up a hill or to pass someone.....I would also get a service engine soon light...I changed the fuel filter and the cps.......I don't get the service engine light now under acceleration but the truck ran around 10 miles and then started losing power and chugging away........no codes are stored........I am running bio diesel now and I have made sure to keep extra fuel filters with me on trips... I've been through 2 so far..I exited off interstate and got on the local streets and it ran fine. We need to travel this weekend ....Any ideas?