Fuel Pressure Regulator question very quick

[obsolete]

what would happen if i don't connect the vacumn line for the FPR? i can't find where it connects to on the FPR. let me stop lying..... i can't find it.....lol......:bash:

[orion::S14]

FPR is on the END of the fuel rail, rear of the head.

You'll see a little nipple on it...that goes to the vac port on the side of the intake manifold, close to the rear.

And if it's not connected:

On a N/A motor (stock KA), it'll run rich under vacuum (idle, part throttle).

On a turbo motor, you'll lean out and detonate under boost.

...

The stock FPR is used to keep the pressure differential across the injector tip at ~43.5psi...so under vacuum, it lowers the pressure to ~35psi, and under boost, it increase fuel pressure at the same rate as the boost (1:1 ratio).

Find it, connect it.

- Brian

[aznpoopy]

its pretty hard to miss...

after the #4 injector look to the end of the fuel rail

you'll see a small circular metal thing with a very small metal extension. the hose that plugs into that is probably the only hose that small in that general area.

http://catimages2.sophio.com/webapp/wcs/stores/servlet/imc/images/full/64007.jpg

good pic of the plug on the right.

[TheSparo]

i could have sworn it was at the front of the engine... not the rear

[MasterOFDrift]

sr=front ka = rear

[projectRDM]

KA using an Altima rail = front, and it looks good as hell too.