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.
Knock Control System
The knocking control system consists of a knock sensor, knock control unit, and distributor with a built-in IC ignitor. It optimizes the ignition timing so the engine may develop the maximum output with minimal fuel consumption and without causing a knock.
When a knock occurs in the engine, the knock sensor detects its vibration and sends a signal to the knock control unit. The unit, which detects the knocking signal, determines its intensity and sends a timing retard signal to the IC ignitor unit in the distributor. Thus, the ignition timing is adjusted to the moment just before the knocking occurs.
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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.