|
Yep, that is a fuel pressure regulator and if your car is in fact a K-Jet and not the later LH Jetronic then you do not have said part. If you do have an LH car it will be located on the front edge of the intake manifold and it will be attached to both the fuel rail and the fuel return line. All it is is a rubber diaphragm with a calibrated spring behind it that creates a controlled leak back to the tank to maintain fuel pressure. It also responds to vacuum so that when the vacuum source goes away, like when the throttle plate opens, it bumps the fuel pressure .5 BAR or about 7PSI. It does this not as an enrichment feature but just to maintain the pressure differential at the injector opening.
The end that is threaded and has a nipple on it, the threads are what is used to mount it with. A large 22mm nut threads down onto a bracket that you stick the threaded end through and this is what retains it. The nipple end of that same fitting is where the rubber fuel return line attaches via a hose clamp. The threaded fitting that comes out of the side is where the fuel rail bolts up to it, it is exposed to direct fuel pressure and it dumps the excess fuel through the other fitting that has the nipple and rubber return line on it. The little nipple on the opposite end is where the vacuum source from the intake manifold connects to it.
If you have one of these and you need to change it out make sure you undo the fuel rail fitting first while the whole thing is held stationary by the bracket and 22mm nut. Then undo the rubber return line, vacuum line and finally the big nut.
I hope that answers your questions, if not let me know.
Mark
|
