fuel issue?

[04stroke]

ok ever since i installed my air dogII ive been having this problem that when i get down to less then a quarter tank of fuel my fuel pressure drops randomly(but mostly when im turning a corner or come to a stop or accelerate). when my fuel is below a quarter tank but the light hasnt came on yet,when i come to a stop the fuel pressure will go from say 60psi to like 30psi then back to 40 then drop to 0 for a few seconds n then the truck will almost stall and then it goes back to 60 psi and truck runs fine..? i dont understand why? its been doing this since the first day i had low fuel with the new fuel pump..any helps much appreciated

[Newman]

Did you replace the pick up tube? Is it the recommended height off the bottom of the tank?

[04stroke]

no i didnt replace the pick up tube i was told that you dont need to with the airdog II..that with the airdog 150 you do though... mabye im wrong?