what motor... my friend has a 94 hatch and has a b18c1 and it was doing this forever.... so we took off the fast idle control valve and bought a connector for the coolant line to the iacv.... got a metal plate and blocked off the bottom of the throttle body where the fast idle control valve was... fixed the problem.... he had got cams while it was doin this erradic idle and never actually heard them idle until then.......it was music to the ears