G 3500 1 Ton Van V8-454 7.4L (1989)
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Throttle Position Sensor: Adjustments
The TPS is not adjustable. Each time the voltage drops below 1.25 volts and stops, the ECM assumes that this value is 0 throttle angle and measures
percent throttle from this point on. Therefore no adjustment is necessary.
If the proper range cannot be attained, replace the sensor.