I went & checked power at both pumps, fuses & relays. All checked out good! If I just turn the key in the on position and cycle the pumps my fuel pressure is 40psi, then to start the engine the fuel pressure drops to approximately 34, unplug vacuum line & I get 2 or 3 psi more on gauge. It seems that fuel pressure drop by the fuel schematic is from the fpr the one that is in a terrible location is just letting fuel circulate from main pump back to water separator filter head and just make that circle over & over instead of going up to the fuel rail. I have checked for blockage from the screen on the pick up tube, installed new anti siphon valve, inline filter had no restrictions, installed new water separator filter, made sure old seal ring was off filter head & applied oil on new filter seal. I also used thread sealant (liquid type) on all fittings at the tank & anti siphon valve. I will try and get my hose crimp plastic pliers down on that return line & reinstall my gauge for that test. I hope I can change that fuel pressure regulator without having to lift the engine out. It's tight against the hull in this ebbtide. I read a post where paint came off the inside of the cooling system and made the regulator fail. Thanks for your help.
Frip
