2001 Maxima with 166000 on it. Nice miss at idle. Just put new spark plugs in it. The spark plugs I removed from Cylinder 5 and six were close to white. The rest of the plugs i removed looked good. Light brown on the insulator. Had this problem for the month I had it and it just got b.ad. Put a patch on the cat about a week ago. A O2 sensor went just before that. Tested coils and all looks good. Will post scan pics.