I have a 2002 Nissan Sentra SE-R with an auto trans. and the QR25DE I-4. It idles really rough in drive, but in park and neutral it is as smooth as could be. I'm baffled, to say the least. I recently replaced the spark plugs, I got NGK Iridiums and I gapped them at .0444. I will be getting the pre-cat removed within a week. Any help would be greatly appreciated. Thanks in advance!