Have this posted in the 911 forum right now, but here goes.
Two weeks ago I installed my brand new FASS 150/150. No problems at all, and I only had to start it twice to get the air bled out, sweet. I left work late last night and my fuel pressure gage was fluctuating between 5-15 psi. It seemed to get lower when i tromped on it. My truck does have a larger siphon tube, I have verified 12V present, filters are new as of two weeks, and my tank is clean. No water in my fuel, and it wasn't cold enough to gel last night. How is the pressure regulated in the FASS is there something easy to check?
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2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, Dual 7" Black Stacks with rain caps, Banks Big Hoss Bundle, Goerend Full Built Trans, Smarty REVO, DIY Fuel Control Actuator Mod, FASS 150/150 and custom big line kit.