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Home >> Jaguar >> 1992 >> XJS 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Idle Speed & Ignition Timing >> Ignition Timing (XJS)
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Ignition Timing (XJS)

ECU controls the ignition timing by monitoring intake manifold vacuum, throttle position, engine air, coolant temperature and engine speed. ECU uses information received from crankshaft sensor to monitor engine speed.