I am following your posts closely. Thanks for the excellent documentation on this subject. My truck has the warm idle miss also. Since it mimics a poorly adjusted carburetor i too thought an injector was leaking and had them rebuilt(not the cold start, though). It did not help. There is one piece of data that may be a clue. I notice it doesn’t miss when the a/c is on and the idle raises slightly. I hope you can crack this.

A couple more thoughts on this topic. When i was about 18 my dad had a brand new 86 Toyota 4x4 pickup and mom had an 84 Celica Gts, both with the 22re. I used to drive and maintain both of them. Both were run up into high miles over the years and neither one ever exhibited this warm idle miss. My dad, being a super car guy would have lost his mind if they did. I know, small statistical sample, but this makes me think the problem has more to do with age than actual mileage. I quickly checked a Celica forum toyotacelicas.com and do not find reports of the idle miss in 22re Celicas but will keep reading.