My problem on the way to tx. Towing 5th wheel lost power on slight hill after pulling bigger hills with no problems got code p0087 reset but nopower no check eng. Light made it to tx. Only drive in 4th gear had to keep rpm above 2200 or it went into limp mode got two diag. One said cp3 pump weak next went to performance shop in dallas the said nothing found to cause it injector ballance was within spec. Truck has 254000 miles injectors at 70000 miles fpr at150000 miles had duramilage tune at 150000 mile second shop said change the primary rubber fuel lines in process of doing that also fass pump and nicktane filter adapter