My 88 325is was sitting since 2005 (at least, that was the registration expiration). I replaced the head (apparently the timing belt had been snapped by the previous owner) only to find that there is a rough idle that sounds like a misfire on every cycle (if not 2-3 misfires).
The engine runs nice and even at about 2k+ rpm's.
Also, at all rpm's there is a substantial plume of white smoke from the exhaust. I have not replaced the gas as of yet.
What is going wrong???