i installed a hitch a few weeks ago and have been towing every weekend since. i noticed yesterday when coming back home with a small load, a faint knocking sound coming from what sounds like the front left of the car. it sounds like a marble in a tin can being shook around, but not really fast, kinda fast and methodically. but it only made the noise when accelerating and would stop when i completely let off the throttle. today with no trailer i tried to replicate the noise with no luck. anyone have any ideas?
mods to date-
2000 jetta 5 speed, 240k miles, 17/22, tdtuning stage 3, unknown monster nozzles, fmic w/2.5" piping, dc stage 4+ clutch, 10# flywheel
thanks in advance