How much time does it take to reverse the exhaust fumes into a 1999 Pontiac Sunfire?

  • Thread starter Thread starter So!
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So!

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No, I am not trying to kill myself, nor anyone else. I have heard that exhaust fumes can be reversed from spewing fumes to the external air to spewing fumes to inside the car where driver and passenger sit. How long does this take to do? 8 hours or less depending on the skill of a mechanic?
 
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