I unplugged MAS once I found where it was located and it made no difference. Tried to drive and again keep dying when I when to stop or slow down to turn.
I purchased a OBDII & CAN SCAN TOOL. Then found it is missing the cable to connect to PC.
I ran a scan following directions I saw on a Robert DYI ...

Love my 94 850 Turbo Wagon but it does have it little issues like fan cutting out on heat/AC after a couple of minutes, and rear door not always locking. Then last week it starts dying on me, I haven't had any real mechanical problems with it since purchased (6/2010). Finally I get it home and park ...