I've changed the location of my rising rate fuel pressure requlator from my previous location and the pressure dropped 10psi. I moved it from near the water pump neck and moved it to the brake booster. The lines are now alot longer so I gather this may be the issue. Does anyone know if this is an issue? I could not place it any closer due to the fact of install alot of the emissions stuff.
THanks,

 

Mine is by the brake booster along the firewall also but have not experienced comparisons vs a different location

 

should be no change, but just readjust it with the adjuster screw with the vac line off

 

maybe you had a kink in the hose? some poorer quality AN fittings at the 90deg fittings do restrict flow quite a bit? (there use to be a picture going about for the ID reduction from some fittings)