How does ECU detect cylinder misfire...... - Honda-Tech - Honda Forum Discussion

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How does ECU detect cylinder misfire......

Old 12-12-2011, 03:46 AM
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Default How does ECU detect cylinder misfire......

Guys, in chasing down a couple of cylinder misfire codes I changed all the usual suspects...plugs, wires , cap rotor on a newly acquired clunker. Question is , what parameters, or inputs, are provided to the ECU and logic used when the ECU posts misfire codes. I am sure these cylinders are firing at some rpm, but have not determined the level of efficiency of the cylinders. May have burnt/damaged valves, broken rings, bad cam lobes or maybe ineffienct fuel delivery to these cylinders. Just wish to learn how the system works........
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