Question about 1989 Ford Mustang

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WHITE EXAUST SMOKE WATER VAPORE COMING THROUGH AIR VENT CUTS OUT WHEN DRIVING LIGHT COMES ON AN OF CAR ACTS UP BURNS OIL

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Well, this definitely sounds like you have a blown head gasket, and maybe a busted heater core (water vapor out of air vents). Both were probably caused by the car overheating creating a lot of pressure in the cooling system and blowing the head gasket(s) and maybe the heater core. The vapor out of the vents could also be caused by external coolant leakage of the head gasket on the hot engine bringing the vapor inside the cab via the heater fan...

I'd get that checked before any major engine damage happens...

Posted on Sep 09, 2009

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Posted on Jan 02, 2017

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My guess is that it's probably not smoke or you would have already had a fire.
With that said I'm going to say that it's steam in which case your heater core (which is a small radiator located under the dash) is leaking coolant and the resulting steam is rising through the vents. The steam will have a sort of sweet and yes, a steamy smell to it. It will also leave a funny film from the radiator coolant coating the inside of the windshield.
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Please clairafy..

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