Question about 1992 Mitsubishi Galant

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My car overheats when driving on the freeway with the A\C on, but cools down when driving slower through town or when car is idling. Isn't it supposed to do the opposite?

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If you have something restriction the air flow then driving fast would cause more problems, you might want to look into that 1st , then look into the thermostat, check the electrical system of the cooling fans, also check the coolant temp.sending unit. Another thing to look into is the water pump i have seen some that lost 1 or 2 impellers and did not have good water flow.

Best of luck to u

Posted on Sep 02, 2010

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