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I have a 2001 Accent,
the RPM goes up/down alot when engine is idling (upto almost 2000 then down
to around 500). does anyone have any ideas what would cause this?
There have been a lot of throttle position sensors in Accents and Elantras
made in 2001 and 2002. Scan for codes first, especially if the check
engine lamp is on.