AOA people.
I have a Toyota Passo 2008.
I wanted to know that whether anybody knows the reason behind the knocking sound in the engine while pushing the accelerator as its very irritating.idk why it is there as it wasn't before.few days back when i started to fill some high octane, it did work but not for very long.can anyone suggest me a permanent fix to this issue.
Will be very thankful.
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