Ive got a 99 7.3 with 250,000 miles on it. It has run fine all day but just jumped in and won't start. It cranks over but won't fire. Check engine light doesn't come on. About two weeks ago it cut off twice at idle but haven't had that problem since. Anybody got any ideas on whats up? Thanks!

 

Check engine light doesn't come on? What about the wait to start light? Or any other dash lights?

Have you checked for any blown fuses? Like maybe fuse #30?

 

OBDII tools link and the last link in my signature will prove helpful in a huge way.