Flying Dutchman TH

Been around the webs but still confused on this. Mine is 1992 968 (RHD- if this helps), looking for a definite vacuum routing. And would like to see your comments/helps.


In pic 1, as per Porsche diagram.

(A) Currently it goes to the fuel pressure damper in my car. Is that correct? I don't see such a line running to brake booster in my car.

(B) Currently, it is "Y" connector in my car, not the "U" like in the pic: one goes to the front heater control valve (located just behind the distributor unit) and the other goes to the rear heater control valve. Yes, my car has TWO heater control valves. Is that correct?

(C)/(D) Big confusion here. Looks like (C) goes to the front air valve and (D) goes to the rear one. When you look at the following pic, looks it they go another way around.


Thanks in advance for all comments and appreciate your help.

968 GUY

Post a pic. Would be more helpful. 2 heater control valves....hmmm.

Flying Dutchman TH

Not so sure if they both are heater control valves. But one in front (behind distributor unit) and one in the back (above bell housing) look identical.

Flying Dutchman TH

The front and the back I'm talking about. There's a vacuum line each. Now I connect both lines via "Y" to (B)

Sorry I can't take the real pic as the car is in the garage.


Thanks in advance once again.