Fuel Draining from Filter

[6 Nebraska IDIs]

I honestly can say I've never had this happen before. My brothers truck is draining all the fuel from the filter if it sets for more than 4hrs.

 

[6 Nebraska IDIs]

Weve checked for fuel leaks and cant find any anywhere. Any other ideas?

 

[icanfixall]

If he still has the mechanical lift pump my guess is the check valves in it are *****. Cheap to replace too. About $25.00 most anywhere for another lift pump..

 

[6 Nebraska IDIs]

Thats what I was thinking too. I gave him the extra holly pump i bought from you. He wants to go electric.