high rpm stumble

I just did my TB and the IAC, about the worst I have ever seen, just a tip, i went ahead and replaced both gaskets, and on the iac i used pernatex form a gasket 2(it only takes a small amount) to hold the seal real good and let it dry, before mounting back on TB. and i reset the computer. mine ran much better, some people have said it took driving around a few miles to get everything to settle down. I did the form a gasket as a precaution, since i have motor control problems with my right hand, but learned that trick long time ago when i had a mustang which has same issues.

 

2000 Toyota Tacoma 3.4 want rev past 2800 rpms and there are 5 things that I haven't tried or replaced yet and they are fuel pump,fuel injectors, A/F sensor,cam sensor and the 02 sensor.