Ok, so I didnt notice this until a few days ago but I bought an 02' WRX sedan a few weeks ago and it has a weird smell that I think comes from the vents or inside the engine bay. The reason I think it is coming from the inside of the bay is because when my windows are down I can really smell it. It smells like straight up feces at times. I scoured the interior and it smells fine. Could it be the Catalytic converters? I wanna eradicate this problem and I hope somoen can give me some ideas on what it could be.