VX lean burn monitor - enhanced how to desired

[monroe74]

"I'm not sure if this technology was applied to the earlier 92-95 civics"

Maybe you already realize this, but the passage you cited is discussing an engine that didn't exist back then. Other passages in the article discuss the earlier engine, but it's important to be clear about which engine is which.

"it seems like lean burn mode on those engines was simply an indicator of whether it was in the first 'vtec' stage or not."

Both techniques are happening, and they're happening at roughly the same time, but they're still two different techniques. And I don't think it's safe to assume that the VTEC transition is simultaneous with the lean-burn transition.