Astro Van M V6-262 4.3L VIN B TBI (1991)
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.
