I have a d16y8, where do I connect the hose coming from the bottom of the fuel pressure regulator??

 

i looked all over the diagrams but none of them show where the bottom hose goes.....

 

It connects to the fuel return hard pipe (1/4" diameter in a Civic) at the base of the firewall under the brake booster.

 

there are 3 of those.......the one in the middle is the gas tank vapor line, its not that ho is it? which one oher than that? thanks

 

take some pics

 

where the clear hose is........

 

Holy crap NO !!! You cannot return raw fuel back into the intake manifold. You could hydro lock the engine. The clear hose is connected to the intake manifold where the OE purge control solenoid hose would normally be connected. The other side of the purge solenoid would go over toward the battery and connect to the charcoal cannister.

The bottom of the FPR needs to be connected to the fuel return port at the FIREWALL... I never said anything about the intake manifold. You said there are three hard lines there... the largest one would be the purge/vent pressure hard line connected to the fuel tank. NOT what you need. The next sized hose connects to the fuel filter and ultimately up to the fuel rail... 17mm nut cap at the right side of your pic above. The smallest hard pipe would be the fuel return to the tank... same size as the FPR. If you still are unsure as to which is which... pull the rear seat bottom, remove the 4 phillips screws holding the fuel access cover and expose the fuel pump tank assembly. The fuel feed line is a push lock type of connection... pinch the green clip to remove. The return line is a soft rubber hose that is secured by a silver hose clamp. You can blow compressed air into these two hoses and see which hard line up front has air coming out of it... this ensures proper connection.

 

Where the fluorescent hose connects to on the FPR simply allows vacuum to dictate how much the diaphragm is open to control the rate of fuel pressure.