I went to a do-it-yourself high pressure car wash and I sprayed off the undercarriage (it'* snowing like crazy here). Anyway, shortly after that wash I heard this damn subtle vibrating or buzzing sound, from under the car that occurred whenever I pressed the gas pedal. It only happened when I pressed the gas for some reason, and now it does it when I'm idling AND it'* getting louder. I think maybe something'* loose after I sprayed it
Could be something with the exhaust I think. Can anyone offer any help?? Thanks, I'd appreciate it.