2013 dart SXT Tigershark 16-valve 2.0L.... While in PARK or, while stationary in ANY gear, the idle is obnoxious! It resembles driving down the road at 55mph and someone in the back seat open their window. You know, that "low tone" bass sound that hurts your ears! The idle rpm is within operating range while stationary, no stall issues, no acceleration issues, no loss of power issues... Only while stationary! It truly hurts my ears! If stationary, and raise rpm to approximately 900-1,000 rpm's, ALL IS BETTER! Can anyone please advise? Thank you in advance!