Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJAGUAR2000XJR (X308) V8-4.0L SC (AJ27)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE SPEED SENSORDESCRIPTION AND OPERATION
2000 Jaguar XJR (X308) V8-4.0L SC (AJ27)
Engine Speed Sensor: Description and Operation
2000 Jaguar XJR (X308) V8-4.0L SC (AJ27)SECTION Description and Operation
Engine speed and crank position are monitored by a sensor which is mounted on the cylinder block (flywheel housing) in front of the crankshaft drive plate. It indicates rotational speed to the ECM in the form of 35 pulses per crank revolution. Engine speed is used for synchronization of fuel and ignition systems, as well as other functions.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.