quick vacuum questions (big pics warning!)

[Jonny_five]

Is this plug supposed to be capped on a 91 SPG?


Same question with this shockingly green plug


And where is the black plug on the cruise supposed to go?


Thanks!

[Orca]

The plug on the manifold is blocked - don't worry about it. I know you are, but it might be from any number of systems that has been removed. Guys ... more guesses needed

The green plug is not standard - that's something the previous owner has installed. Again, it's blocked ... so don't worry about it. In that picture you might notice the plug with the clip in the central area wiring that's not plugged into anything - that would go to a cold start injector if you had one. They were phased out in some markets and some engine builds around 1990. We call that one an "belly button"

Finally, the black part of the cruise is simply the breather. Suck on the pipe that connects to the white plug and your throttle should open. That motor sucks in fresh air and blows it down the white plug and hose connected ... throttle stays where it's supposed to.

[Jonny_five]

Awesome! That's just what I was hoping. Now maybe my cruise will work. Thanks!

[16saabs]

the twin one should be for the air/vacumm controlled air flow distribution inside the car, cannot see where other pipe goes to and cannot remeber off hand

[Shan]

In the top pic, the plugged outlet should go to a the vacuum chamber located below the power steering reservoir. The bottom hose which is connected goes to the over-boost switch under the dash.

[Jon1]

Your '91 SPG came from the factory with the Exhaust Gas Recirculation (EGR) system. There was a Saab service bulletin describing the procedure to remove the EGR system. It appears to have been done to your car.

This system was installed on all '90 and '91 SPGs and some other '90 and '91 900 turbos, especially California cars. I have two '90 900 turbos, one with EGR and one without.

Here is a photo of a '90 turbo with the EGR system:



Notice the "tank" to the right of the coil with the vacuum lines on it, the tube with the fins on it that goes under the top radiator hose and under the throttle body inlet hose, they are part of the EGR system.

More photos here:

http://www.nysocphotos.com/gallery/5...47654955_iqY5d

The cruise control pump fitting connection photos:

http://www.nysoc.com/gallery/album202/P0020807

Follow the link for more photos.




Jon
jon1..

[sv762]

Would anyone happen to have a picture or know offhand of where the two vacuum lines from the vacuum tank are supposed to go?

I know one goes to the intake manifold, but I have no idea where the other should connect.

[TooMany2cvs]

Originally Posted by sv762

Would anyone happen to have a picture or know offhand of where the two vacuum lines from the vacuum tank are supposed to go?

I know one goes to the intake manifold, but I have no idea where the other should connect.

Through to the heater distribution switch on the dash.