TPS (Throttle Position Sensor) 
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Gallery: Gallery 2 navigate up Album: Harling navigate up Album: '89 LeBaron navigate up

Started bogging at a particular throttle position. Replaced it and the problem is gone. This is the post-mortem of the switch that went bad. (Sorry for the hack job removing the background; been playing with graphic editors. :-)

Exploded view of the switch, from the side: housing, coil return spring, potentiometer knob w/ brushes, resistor/circuit "board", cover.
Exploded view of the switch, from the side: housing, coil return spring, potentiometer knob w/ brushes, resistor/circuit "board", cover. *
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Exploded view of the switch, concentric.
Exploded view of the switch, concentric. *
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Closeup of the potentiometer components. Note the worn spots where the brushes contact the inner resistor "track".
Closeup of the potentiometer components. Note the worn spots where the brushes contact the inner resistor "track". *
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Gallery: Gallery 2 navigate up Album: Harling navigate up Album: '89 LeBaron navigate up
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