Who on here is smart with ECU codes?

What triggers the engine to think random misfire?

does engine have ability to recognize build up of improperly combusted gases in combustion chambers?

what sensors or feelers if you will, does the engine use to determine random misfire?

97 Montero SR w/Mitsu Adj Shocks & Rear Diff Lock ARB Front Diff Lock 4.9 Ring/Pinion 3.15 transfer box 43:1 crawl ratio 2" suspen lift 2" body lift 2" Gas Tank Lift 35x12.5 MTRs 15x10 Wheels Rock Sliderz ARB front bumper w/12k winch Custom rear bumper