The best advice is to re-read the last paragraph in Don's post until you completely understand what he's trying to tell you. You won't know what your REAL "problem" is until you've done a full analysis (yeah, yeah, PITA isn't it?). For example; have you checked for fuel dilution yet? If that were the cause, rippin' the engine apart would be a complete waste of time and money. Guesses are fun, but can be costly...........for you in this case, not us.