Low Fuel Pressure/Loose Fuel Heater ***.
I've had low fuel pressure ever since I installed my fuel pressure gauge (and who knows when it started). It varies from about 8 psi to 15 psi max.
I removed my prefilter "hoping" that it was dirty which could have been the root of my problem. It was virtually spotless. It was then that I noticed that my fuel heater assembly was loose. I haven't noticed any fuel leaking but could this looseness cause a low fuel pressure or perhaps some other problem such as allowing air into the fuel system? Does tightening the prefilter seal up the heater assembly also?
I have a new lift pump that I was going to put on but I'm wondering if I should reassemble things and see if there is any change in fuel pressure. Any thoughts? 
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1996 Dodge 2500 4X4 SC, SLT,Cummins 12V, 5-spd., JRE 4" exh., TST #10, AFC Spring Kit, BD 300-H.P. pump, DDP Stage II Injectors, ATS Exh. Man., 3K G. S., Horton Fan Clutch, Exhaust Brake, SB Con O Clutch, RS9000 Shocks, Combo Gauge, AFE Air Filter, Brite-Box, no turbo silencer ring.
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