What are some of the possible causes of spark knock?
What will be an ideal response?
The following are other possible causes of spark knock:
1. If the engine knocks under load, check the base spark timing first.
2. Check the cooling system temperature. A failed cooling fan switch, a stuck thermostat, or a restricted radiator can also cause pinging.
3. Preignition can result from a loose spark plug or spark plugs of too high a heat range.
4. Fuel of too low an octane for a high-compression engine can cause spark knock.
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