redneck2thamax

Fuel Pressure
On my 99 i have installed the raptor 100gph for about 6 years. been working great, it is set at about 18 psi. and only getting as low as 12 psi wot. Recently i took it in the shop to get the fuel gauge fixed and they ended up having to do a new sump tub because couldn't find a fuel sending module that didn't have the pump. This was after they didn't believe that a 99 didn't have a pump in the tank. So now my fuel pressure seemed to be inconsistent idle and WOT would go to 0 psi... I have replaced the sensor which seems to be reading consistent but at idle reading 18-21psi, at WOT it is at 0, and driving on the highway cruising at 75 it can be anywhere from 1psi to 12 psi. seems odd. When i am at WOT the truck doesn't shutter as if its not getting fuel, but its just reading at that. The shop I took it too says they have I made sure the new module with the pump has the pump disconnected ( which wasn't initially done) and that the sump tub is larger than the OEM, and has the 2 screens on it, Was wondering if anyone had any ideas or suggestions.

thanks