whenever my rpm's drop past 2000 to around 1500 i get this odd noise. its coming from the drivers side and its almost like a deep clicking or knocking noise. this noise doesn't last long, but it is there for a brief second or too. the noise quiets when i push in the clutch as well. at first i thought it was ice bouncing around in the engine bay since we got tons of snow the last couple of weeks, but all the ice has melted away now.
this didn't start happening until after i got my car started the following day after i crossed a mega flooded road. which is the reason why everything under the hood froze up probably
my oil pressure is fine, maybe a bad batch of gas? or slight misfire? idk
any thoughts or ideas?