I got a 95 f-350 when pulling any kind of load it does fine for about 15 minutes then the check engine light comes on. If you keep going for bout 45 minutes it will gradually loose power till it wont move then quits. if you cut the key off then crank it back up it is fine and the check engine light is off but it quits again quikly, ( this is only if you run it till it loses power and dies ), when the light comes on and you cut off shortly after then back on its perfectly fine. I ran the codes and keep geting the boost sensor. I think my turbo has been going out because it burns a little oil andaround the turbo usually has a thin coat of oil. Any suggestions? need to fix it asap.