I was looking for vacuum leaks, and came across this thing on the top, back of the injector pump. It leaks regularly on and off in spirts at idle (you can hear it hissing), but when the engine is up, it hisses, and drains the vacuum from the rest of the car. I unhooked the vacuum line from the top, and went around the block with the car...no problems.

Is this a necessary part of the car? Any known benefits to keeping it hooked up?

Attached Thumbnails

   

__________________
My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior