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Sorry, it's a fact. (I'm an ASE Master Heavy Truck tech, and worked the past 3 years for Navistar Defense) It's true, modern diesels (and likely some modern gas engines) can detect misfire through time change in the crank sensor.

And yes, if you remove enough counterweight from a single cylinder engine, it stalls more easily and requires a higher idle RPM. Have a look at model airplane engines, the old COX .049 has no flywheel or counterweight at all.



Nobody's arguing that a misfire will slow down a motor - put enough misfires in sequence and its called "killing the ignition" and yes, the motor WILL slow down and (I'm going out on a limb here !!) eventually come to a complete stop.

And I won't argue that if you remove the flywheel and any counterweights you will also see the crank slow down. But let's be practical and talk about common, everyday engines in normal operating modes. Any properly running engine will have absolutely no detectable loss of speed between firing stokes.