I have air coming under the dash floor while driving
Do you have your vent on? If not, maybe you have a hole in the floorboard and or near your firewall allowing outside air in the cabin. Car typically rust there. Have it looked at, you don't want to be breathing in exhaust fumes.
I did not have my vent on I will try your answer thanks
Unless your one of those idiots who cut their exhaust off before the catalytic converter there will be no fumes coming in. Look at the blower box under the hood for cracks or chunks missing.
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