I have a 1999 F-350 I bought in 2000, 235,000 miles. Its been a very good truck. The last few years the truck sputters when it is raining and sometimes cuts off completely enough to turn on the engine light. I have had multi local diesel shops look at it, the last shop installed another computer and replaced O rings at the injectors. I have changed cam sensors about three times thru out the years, when needed. any thoughts?