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Codes are; E013 C and H E024 H E027 E028H B124H Cleared the codes and all that came back was E013 which was expected as the 02 is still disconnected.

I am updating this post because it may be of interest in other areas. After trying to ferret out the original maker of the scope, which I think is Ikeda Lens in Kyoto Japan, I did what I should have done earlier. I took it to a local camera shop. He took one look at it with a bright light from behind and stated it is a fungus🤨 I had never heard of such a thing but he said it isn't uncommon and he sometimes sees it in older camera lenses. He said it is on the inside and may be able to be cleaned off if it hasn't damaged the lens coating badly, it will be improved. A new one for me and I should know in a few days.

I disconnected the 02 sensor and the service engine soon light did not come on. I let it get to operating temperature and the bucking is still there, but it seemed like I could give it more gas. I find it hard to believe that it is a mechanical issue as I would think that it would do it all the time and not just when it is warm.

Ronnie, that is a great idea. If it works I'll try to get you a raise as a troubleshooter on this Reatta Forum as I am on good terms with the Moderator. I am really sure it is not a mechanical issue as it would do it all the time. I'm leaning towards the 02 sensor or crank sensor with the ECM last. I remember years ago there were a couple of guys that were having ignition/driving issues and it was suggested that they remove the ECM from it's mounting position and leave it laying on the carpet as it might have a short or overheats after running the car. If it ultimately turns out to be a "silver box" I believe it will be the first one I will have ever replaced. And that covers 4 cars and combined miles of over 900,000 [not all miles by me].