GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide
Throttle Position Sensor
REMOVAL & INSTALLATION
Remove the air cleaner and disconnect the TPS electrical connector.
Remove the two attaching screws, washers and retainers.
Remove the sensor.
With the throttle valve in the normal closed idle position, install the TPS on the throttle body assembly. Make sure the TPS pickup lever is located ABOVE the tang on the throttle actuator lever.
Install the two attaching screws, washers and retainers. Use a thread locking compound on the threads.
Reconnect the electrical connector and install the air cleaner.