There were actually 3 different cruise control setups used by subaru.
1 was factory installed. It uses a electric Vac pump.
The other 2 are dealer installed, utilizing engine vaccum.
1 of the dealer installed systems utilized the steering wheel mounted controls.
The other dealer installed setup uses engine vacuum and a single control panel that mounts on the dash, right of column. Ever seen Cruise in a DL wagon? What he describes is this system. Dealer installed.
This of course proved my theory of producing positive pressure having an affect on the cruise control, since I have the last option, the one with the control panel mounted on the dash to the right on the steering column, not to mention the original invoice from when the car was sold requesting cruise control, and also the invoice after the cruise control was installed in my car from the dealer. Stupid dealer, install a manifold vacuum system on a boosted car. Where did they expect vacuum to come from while under boost ESPECIALLY at freeway speeds where you use cruise most of the time!? Seriously, what idiots, they didn't think that all the way through, especially when there is a factory solution to the turbo problem
So my question is this, does anybody know the part number of the factory cruise control vacuum pump for my 1990 loyale turbo wagon? I can't find it anywhere. All I can find is the legacy part number. Can I use a pump from a legacy if I can't find one for the loyale? I know there will be some rewiring required along with finding a place to mount the leagacy unit if I go that route. I guess I should also ask if anyone has one they want to get rid of, if you have one, PM me, I am interested...