thanks for your advice. this morning, I looked for vacuum leaks and I think that I found a large one within the flexible intake ducting right after the MAFS. I taped it with electrical tape and it stabilized the idle. After warming and running it for 15 min, I noticed that the idle pulses between 800-1100 but it does sound much better. I ran the codes and I still get P300, but now different codes p302,304,306, 308. Never got these in the past. Not sure what you think but instead of tracking the coils and plugs, I will change the intake ducting first and then see if I need to replace anything else. I am still concerned about MAFS and a stuck PCV valve and perhaps how it can be affecting the idle.
by the way, I have a 2000 landcruiser with 218k. I guess that after I figure the rest of this out, I will finally start to baseline it.
here's my data stream. not sure how to intrepret.
FUELSYS1 &2 CL
ECT 73 c (isn't this too low and causing a rich condition)
MAF 15 G/S
SHRTFT22 99 ???
SHRTFT12 99 ???