Can't help you myself. I had friends that had one, and had absolutely no problems with it. Great car all around!
But might try reading thru this at Edmunds.com:
http://townhall-talk.edmunds.com/WebX?50@244.ZKzJc2SFsC0.1@.ee9e613!make=Infiniti&model=J30&ed_makeindex=.ee9e613
It's rather long, but may be something in there to help you. Not sure. Good luck!
Oops! It didn't take as a link here. You'll have to copy and paste the whole link in a new browser page.
Crap! Still didn't work. Allright. Go to
www.edmunds.com go to "town hall", then Infiniti, then J30, then under "Discussion title", go to "Infiniti J30"