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The function of engine speed sensor is to monitor engine speed, which is one of the factors used to calculate ............... .

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Tip: Engine speed sensor → tells ECU when to fire the spark!
Updated On: Jan 14, 2026
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Solution and Explanation

The engine speed sensor provides real-time crankshaft rotation data to the engine control unit (ECU).
This data is crucial for managing engine functions, particularly for calculating ignition timing.
Ignition timing dictates the precise moment the spark plug ignites the air-fuel mixture within the combustion chamber.
Accurate ignition timing maximizes power, improves fuel economy, and reduces emissions.
Deviations from optimal timing can lead to engine knocking, diminished power, or damage.
Valve clearance adjustment is a manual process, independent of engine speed sensor input.
Engine oil pressure is measured by a dedicated oil pressure sensor.
Consequently, ignition timing is the correct response.
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