I replaced the charcoal canister the cylindrical one and the noise of farting or air pressure release from gas cap and rear of vehicle is gone! Simple replacement the hardest part is getting the one 8 mm I believe acre off the top which is in the valley of the frame. Got the part for $170batbcukver ...

I have the same issue, driving me nuts! Thought it was the breaks sticking/rubbing noise or rear shocks. Had my girlfriend drive as I stood outside and the "fart" air pressure was coming from the gas cap area, sometimes from the left rear! Inside the car it sounded totally different more r...