Are you getting any check engine lights? This happened to me before, but I got about 20 different codes that couldn't have all happened at once. It ended up being a bad ECU and it had to be replaced.
Search on this forum and others, there are different diagnostic modes the Throttle Position Sensor goes into if there is an issue between the pedal potentiometer and the TPS.
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2000 Boxster S, Arctic Silver, Natural Grey Leather
Factory: Aerokit I, 18" Sport Classics, Xenons, Heated Seats, Premium Sound, and more..
Upgrades: Bumper Plugs, Door Plug, Clear Sides, Clear Tails, Clear Bulbs, Painted Bumperettes, 997 Shifter, EVO Intake
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