Ok i have a truck here at my shop that we are kinda lost with so any help would be great! Truck is a 93 7.3 IDI... Truck had a dying problem only on front tank and filter was getting clogged so i put two brand new fuel tanks in with new screens on pick up tube,Flushed lines and new filter... Also changed switching valve bc someone broke it and epoxyed it before i got involved! The truck will idle all day and never shut off untill you take it for a ride... truck wont restart on front tank but will start on rear tank and then i can switch to front... Any ideas???