My 1989 FJ62 has 320,000 miles on it now and I have a rough idle issue I can't figure out. It only does it when it completely warms up and it's worse when it's warm outside. After you come to a stop, maybe 4 or 5 seconds it starts to the rough idle. Checked for vacuum leaks, everything is good. Also did a full tune-up and cleaned the air flow sensor. After cleaning the air-flow sensor, it seems to be worse. What's the chances I need a new air flow sensor?
