it basically just a potentiometer, or variable resistor. the resistance changes as the throttle is depressed and a wiper arm moves across the contact. its probably worn out, but you could try cleaning it with some electronic contact or TV tuner cleaner available at Radio Shack.
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Alan
1987 928 S4 (Black)
1997 SVX LSi (Ebony)
2005 Legacy GT (Silver)
1987 928 S4 (Black)
2008 Lancer Evolution X MR (Apex Silver)
2013 G37xS AWD(Obsidian Black)
2018 Q60 Red Sport AWD (Graphite Shadow)
2022 KIA Stinger GT2 Scorpion AWD (Aurora Black)
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