What is the sound of one piston slapping?
What is the sound of one piston slapping?

Before, day 0:

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After:

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Not bad for a weekend’s work! The truck still doesn’t run because O’Reilly’s ordered the wrong upstream O2 sensor for me so I’m going through 1A Auto instead. Spark plugs and spark plug wires have been changed. If it still acts up after replacing the upstream O2 sensor then we’re replacing all the vacuum lines.

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