Re: 92 Ranger Throttle Position Sensor Problem
The TPS is a mechanical sensor, not electronic, and does wear out. You could test it as good, but it might have "dead" spots in the rheostat. Just like the old style radio knobs that after time that would crackle when turning up or down the volume. I replaced the sensor maybe 4 or 5 times during the 23 year life of my '86. I would replace it if in doubt, as it is 15+ years old.