Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2001 Xterra 3.3 High Idle (4000+ RPM) › 2001 Xterra 3.3 High Idle (4000+ RPM) October 24, 2019 at 10:57 pm #895136 Richard KirshyParticipant Lets start with the simplest … Was the vehicle running properly prior to swapping the motor mount ? If so, chances are reasonable the cause of your issue is due to something that was done during the mounts replacement.