We have a 91 Olds Royale - veh starts and dies when put in gear

check for vacuum leaks and scan the computer for codes. you can google "how to do gm obd1 scan" it is fairly easy and requires only a paper clip while you count some check engine light flashes. these cars have been known to have problems with the tcc or torque converter control solenoid. it locks the torque converter in at highway speeds for better fuel mileage, but if they malfunction and the tcc stays locked then the car will do what you describe. google the location on the tranny and unplug the electrical connector to it. if the problem "fixes" then the tcc is bad. they are expensive to replace, mainly labor. you can drive the car with them disabled, but you will lose gas mileage. hope this helps, Mike.

When does 91 Oldsmobile 88 stop running and turns over good not getting no gas