6.2L MPI - Fuel/Water Separator

[Waterman!]

Hi
Has anyone had any luck adding a Fuel/Water separator onto the suction side of a 6.2L MPI without having Issues? When I added one to mine I was left with low suction pressure and it wouldn't run properly. Took it off and it ran fine....

 

[alldodge]

The 6.2 MPI already has a filter prior to the pump. The first 6.2 used Gen 2 cool fuel with a spin on canister filter. Next Gen used a 2 pump housing which also had a filter which is part of the housing.

What is your serial number?