94DI dies when warm, restarts later? fuel??

[ir1680]

my 94 DI fires up and runs fine. At about 170 degrees it dies very suddenly, barely chugs at all. it won't restart, just cranks over. if i let it set 5min it'll start up and die again. if i let it set @30 min it'll fire up and stay going for about 10-15min then do it all again. i've narrowed down that its not getting fuel. i replaced the pump on top of the motor and the filter last year and haven't had any problems untill now. there is almost a foot of snow on the ground and my plow truck only runs for 10 mins at a time. no check engine light. please help the newbee... i work on all my own stuff but have limited knowledge of diesel engines. truck has @155k miles on it but its not abused. thanks in advance, eric

[Jarrod B]

change the pump again or you are getting air in the fuel.

[ir1680]

how does air get in the fuel?

[SCUFFY828]

injection pump probably going bad , need to check base fuel pressure , should be between 5 and 8 lbs at shrader valve on filter housing area , if so , id bet on injection pump

[ir1680]

got 50psi at schrader valve. no pressure drop when it dies. i am hearing a weird air suck or whizzing noise from motor at part throttle. i dont have a buddy to hold throttle so i can narrow it down. truck wouldnt run long enough for me to brick the pedal. if its getting an air bubble it'd have to be at a line or connection right? maybe its just a belt noise or turbo leak? this makes me want to take diesel mechanic classes.....

[SCUFFY828]

ive told you wrong info, if this a powerstroke , then fuel pressure is correct , make sure oil is full and in good condition, try to get codes pulled , helps out alot to steer you in the right direction

[ir1680]

ok i hooked up my scanner and got 2 codes for the cam sensor. no check engine light though. i can only assume its related to my current problem

[ir1680]

cam sensor seems to have fixed it. thanks for all the great info. this site is awesome