1990 pickup 5 speed w/1997 3.4 4Runner. I have a quick question, typical low idle and occasional stall coming to a stop light also an occasional rotten egg smell from the exhaust. So I went ahead and cleaned the iac and tb but it did not help. I went to test the maf and i probed eg and e2g applied air and came up with a voltage fluctuation but when I tested the resistance between e2 and tha I did not get anything whatsoever. I do have a downstream o2 sensor that got a little melted and have a new one on the way but I've read so many different things about whether or not it will mess with the idle. Truck runs great no miss or bucking. Only engine related codes were bank 1 running lean.