what makes a 1998 nissan frontier idle to fast ?
the idler screw is turned up did it do this when you bought it
have you done any work on it or had any done. it is usual for a car to idle high when it starts but it will idle down
no work done idles fast then slow all the time
Throttle position sensor bad,or to randomly idle like this could all so be a vacume leak,near the throttle body.
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