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 MANUALSCHEVROLET1993CAPRICE WAGON RWD V6-262 4.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSKNOCK SENSORDESCRIPTION AND OPERATION
1993 Chevrolet Caprice Wagon RWD V6-262 4.3L
Knock Sensor: Description and Operation
1993 Chevrolet Caprice Wagon RWD V6-262 4.3LSECTION Description and Operation
The knock sensor is located in the engine block. The sensor sends a signal to the ECM, by way of the Electronic Spark Control (ESC) module, to retard ignition timing during a spark knock condition. When engine detonation stops and there is no knock signal being sent to the ECM, timing is advanced in small increments. This allows the ECM to maintain maximum timing advance under various engine load conditions.
RENDER: 1.0x
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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.