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A 1988 Toyota truck may knock due to several reasons, including engine issues like worn bearings, which can cause knocking sounds during operation. Other potential causes include improper timing, which can lead to pre-ignition or detonation, and using low-quality fuel that does not meet the engine’s octane requirements. Additionally, carbon buildup in the combustion chamber can lead to knocking as well. Regular maintenance and timely repairs can help mitigate these issues.

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1w ago

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Do you not own a tape measure? A yard stick? A ruler? A piece of string? Anything that can be used to answer this burning question. Got a library in your town. If you would put as much effort in finding the answer, as you do with asking the questions, you would already have the answer. One thing you do not want to do, is to buy a book that covers 1988 Toyota pickup's as then you would have no excuse for posting questions about nothing. They actually give people like this drivers license's? What a waste of paper.