gpkull -
Also, keep in mind, this is
only happening on one cylinder. The other cylinder acts perfect. Head/ water temps measure approx. the same. Linkage was adjusted initially for equal exhaust temps (within resolution of adjustment). I believe with all I have done, either the spray pattern of one injector isn't quite right or something else unique to that cylinder or head is causing the problem. I also remember when I first stripped it down, their were radial tool marks on one of the valve seats on that cylinder head. At the time, I smoothed it out pretty good by hand with 1000+ grit abrasive.
After the second full day of running, I believe that the acetone is having a positive effect. Compression feels alittle stiffer, exhaust temps might be
starting to creep up. Maybe this is just wishful thinking, but if I works, and I can use just use this intermittantly until my next scheduled decoking (300 - 400 hrs more running), I'd be happy. I think I'm going to give it a few more days and if things don't straighten out, I'll pull it apart again.
.
Long term, this is not my solution. Next time I decoke, I'm going to pay much closer attention to the valve seats and valves, and will also measure everything else. I will not reassemble until everything is perfect. I will also probably swap injectors if nothing else definitive is found, just to see if this problem moves with the "suspect" injector.