I thought I had an article about an engineer who came up with his own version of a more reliable Chrysler Electronics board, but only came up with this:

https://nepis.epa.gov/Exe/ZyNET.exe...p;MaximumPages=1&ZyEntry=1&slide

and this WVU student’s thesis

http://www.rommet.com/remco/thesis/

and the lean burn efforts by Ford and Toyota

https://www.howacarworks.com/technology/lean-burn-engines

Maybe the articles are on an older computer