Have a 95 JDM spec prelude motor in a Del Sol and the motor started reving when at idle. Does anyone have a way to fix it. Driving me up the wall.

 

Get a vacuum diagram from the library or something and rehose your vacuum sytem, or just try to find a leak on or around the intake manifold, if there is cap it off. Sometimes it could be a TPS (throttle position sensor).

 

problem solved it was in the IAC, had to clean out coolant passage.