not toyota i know but cbf signing up to nissan forum and all that jazz.
GTIR pulsar idles bit rough when cold but not really noticible, however when warm idles up and down 1500-2000 rpm, similar to a vacume leak in a MAP sensored toyota.
drives reasonably ok cant notice anything out of the ordinary but backfires from time to time, only small ones and smells a bit of gas like running rich.
Im leaning towards a stuffed airflow meter, will try another one tomorrow but anyone else got any ideas as to what could be causing the problem if not AFM
cheers in advance