Posts Tagged: single cylinder misfire

The Smart Way to Diagnose an Engine Misfire

How to Diagnose an Engine Misfire Step by Step Quick Summary The ECM detects an engine misfire by monitoring the crankshaft position sensor. It knows when it commanded the plug to fire and then monitors crankshaft speed to determine whether it increases. If the cylinder misfires, the crankshaft will slow because the cylinder has failed to contribute its share of power. That failure can be momentary or constant, isolated to one cylinder or spread across several. Regardless, every engine misfire has a root cause, and finding it requires discipline, not … Read More