The RPM issue can be a few things. Check to make sure there are no vacuum leaks. Also, check the throttle position sensor. If the check engine light is on, have the computer scanned for trouble codes. Most parts stores will do it for free.
As far as the temp, make sure the coolant if full. If it is, check the thermostat and cooling system for restrictions.
Tuesday, September 13th, 2011 AT 2:41 AM