engine wants to shut off

[1986IDI6.9L]

Ok i need help, i had parked my truck for about 1 month went to start using it again and when i went to use my front fuel tank drove about a mile and it stumbles like if it running out of fuel or maybe water in fuel. the tank has 1/2 tank of fuel in what could be the problem any suggestions welcome the truck is a 1986 f250 6.9L diesel

 

[hesutton]

How bout on the rear tank? If the problem only happens on the front tank, there is likely a problem with the fuel tank selector valve on the driver's frame rail. If it happens on both tanks, it could be a number of things. Low fuel pressure from a clogged filter, failing lift pump, a hole/leak in the fuel supply line somewhere, bad fuel........... and so one.

Heath

 

[mobilemech]

X2 Heath, good info.

 

[Agnem]

Standard operating proceedure in these cases is to replace the fuel line from the filter head to your returns with a piece of clear vinyl tubing and see if you have a lot of air coming into the pump with your fuel.

 

[1986IDI6.9L]

when i run on the rear tank its runs like a champ, fuel filter is only a month old, but if i had water wouldn't my water in fuel light come on