Sound like your ac gas running out. Gives off a mowly smell.
That's not what I mean. My A/C is not leaking. The refrigerant pressure is still good. The issue is that even with the recirculating vents closed, I still have outside smells circulating inside the car as though I had the windows open.
For example, if I was driving past a fire, the 4-6 seconds later, I smell the smoke in the car. I understand that your tool doesn't help to troubleshoot this. Could your tool test car doors and bonnets for sound deadening qualities such as quieting engine noise, or reducing background noises for the audio system?