I have a 90 7.3. Wait to start light comes on intermittently. Starts up then dies. Replaced, glow plugs, glow plug controller,fuel rail hoses and seals, fuel pump,(and even installed an electric one on a push button in the cab.)and it still after sitting for 6-8 hours will fire then stall. Crank for about 2 minutes then it will fire again. I had to replace the starter. Today the water in fuel light came on the entire time I was cranking then went to get some fuel cleaner, went back to truck started right up and it never came on again. Can anyone tell me where the leak is?

 

Need some clear hose it sounds like. The fuel heater o-ring is a common source for air intrusion (was in my case also)

 

How did I know you would be the first to reply? Where are these o rings?

 

You did? lol The o ring seats around the fuel heater connector in the FF head. Easiest to pop the head off and work on it on the bench. I cant remember what holds the fuel heater to the head... small screw or something probably and then you can push the heater out via the connector on top. Its kind of an oddball size, but i know others have posted where theyve found the correct o ring

 

And there's two O rings on the fuel lines at the tank, And at the duel tank plunger if you have duels,Fuel filter main gasket and the lower water bowl and don't forget the water drain plug on the filter.

Oh ya the olives too!