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If it is "engine knock", get your fuel tank about empty and then put a bottle of fuel injector cleaner in it and fill it up with the highest octane gasoline.

If that doesn't work and you are sure that it is "engine knock", the next step would be to change the spark plugs, ignition wires, distributor, and rotor.

However, you may actually be hearing "valve slap" that is caused by your cylinder head valves sticking. This will require an expensive trip to the mechanic if you want to fix it.

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10y ago

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