91 acura integra and when the car is idleing the temp gauge goes up to normal but when you drive down the road the temp gauge goes down to cool and the heater does not blow hat air and you just instal?
You need to install a new thermostat. The stat is located at the
lower end of the top radiator hose within the water outlet. After
the stat is installed, run the car with the radiator cap off for
about 20 minutes checking and adding coolant as the air is pushed
out of the system. Keep a eye on the coolant level over the next
few weeks to insure the system does not have a leak which could be
why you had this problem in the first place.