O.K., I've installed an inline Fuel Pressure Gauge in the rubber fuel line before the TB. The gauge reads 12psi in the fuel line but, when the fuel hits the pressure regulator in the TB, does it increase the 12psi pressure before going to the injectors depending on where the regulator is set at? In other words... is there a way to measure how much pressure the Injectors are seeing?

 

that is the pressure the injectors are seeing

the regulator works like you putting your thumb on the end of a garden hose to block the stream

had your thumb not been there the water would have been free flowing and essentially no pressure would build.. you put your thumb in the way and you increased pressure and anything that leaks past your thumb would be the equivalent of what goes down the return line and anything before your thumb would be from the tank all the way up to the injectors.. and then the thumb (regulator)

 

Thanks Pablo! Great analagy! that's just what I was thinking but you explained it very simply, Thanks.