Throttle Position Sensor: Adjustments

Fig. 170 Adjusting Throttle Position Sensor:

1982-83 Models

1. On 1982 models remove TBI unit then the TPS as described previously. Loosely reinstall sensor and position TBI unit on intake manifold without installing bolts. Remove fuel pump fuse.
2. On 1983 models remove air cleaner.
3. On all models connect three jumper wires between TPS harness and TPS, Fig. 170.
4. With ignition on and engine not running, measure voltage between sensor terminals B and C, Fig. 170, using a digital voltmeter.
5. In the closed throttle position, voltmeter should read 0.795-0.845 volts on 4-112 engine, 0.450-0.600 on 1982 4-151, all V-8 engines, and 1983 4-121 engines. On all other models voltage should be 0.450-1.250 volts.
6. Rotate TPS as necessary to bring voltage within specifications. Tighten screws and recheck voltage.
7. Turn ignition off and remove jumper wires.
8. On 1982 models install TBI unit.