[KTL]

Also keep in mind that the engine is likely running/firing better now because the rings have become un-stuck. When an engine sits for a long period of time, the rings do not seal the cylinder walls well. Usually adding a tablespoon of oil to the cylinder (thru the spark plug hole) prior to startup helps to initially seal the pistons to the cylinder wall, when the rings are still sticky.

Glad to hear it's improving. But I think you've still got a lot of work ahead of you. Definitely some treatment is in order to clean the engine beyond the fuel injection. To clean the injection, i'd recommend removing all of the injectors and having them ultrasonically cleaned and tested. New fuel filter, possibly a pump and complete flushing of the fuel tank and lines is in order. Oil sitting in the fuel that long can promote much worse varnishing vs. old, clean gas sitting for a long time.