My 325is seems to rumble very noticeably when I first start it up.
After A while it settles down, but not 100%. This just started
happening 3 or 4 days ago. It seems like there is a bad tank of gas in
it. Or maybe it's misfiring. Or could it be the belts or the spark
plugs? Last time I had it at the mechanic he told me the belts were
going but I didn't want to tack that job on to the already large bill.
Does anyone have any idea what could be going on? Thanks...