Cars & Vehicles
Thermostats
Heater Cores and Blower Fans
Car Heaters

Your 91 integra when idleing will reach operating temp and blow hot air but when driving down the road it will drop in temp and not blow hot air and you have installed a new thermostat correctly help?

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Answer

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Wiki User
02/03/2007

sounds like a clogged heater core may have to be removed and rodded try radiador flush first