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BoiseShark BoiseShark is offline
1979 5sp 928 project
 
Join Date: Apr 2012
Location: Boise Idaho
Posts: 199
Garage
K, one thing i noticed today and I don't know what to make of it is in this picture


below the distributor (where it would be) is a port that says "to vacuum source on intake plenum"

My car does not have this port. The vacuum that comes off the plenum on my car does the following;

1. lined tees off and goes to brake booster (this is correct from everything I've seen)
2. Main line then goes over and ties into the line going into the AAR. (could this be right?) The AAR opens and closes and blows air back into the plenum past the cold start injector.

I don't know why my system is missing this port. It has all other ports...just not that one

The port at the top of the picture that says "to throttle bypass circuit (incl Auxilliary Air Regulator)" has a hose coming up that runs directly into the AAR. This main line is T'd before it hits the AAR and the T runs into the vacuum port in the intake plenum which is T'd to the brake booster as I explained above.

I hope this makes sense.....it barely does to me...lol
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1979 928 5sp project
1984 928S 5sp black on black

Last edited by BoiseShark; 04-28-2012 at 07:12 PM..
Old 04-28-2012, 07:03 PM
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