Hey guys, i’ve been battling with trying to source this noise coming from my crv, it has 210k on the dash. Basically whenever i accelerate there’s this sputtering noise that SOUNDS like an exhaust/manifold leak/motorcycle idle but i cannot locate it , i’ve gone under the car to find the source...

Started to smell exhaust inside the car last week and since the exhaust is 18 years old I tried to convince myself that it really is best left well alone... This what the recirculation button is for right? Who cares if it steams up a little? But wait, we are driving 4 hours to a cabin next...