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How do you test a knock sensor to see if it is bad?

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βˆ™ 2008-03-01 18:54:24

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Knock sensors detect detonation ( knocking ) by reacting to the ping by retarding the ignition timing so you will need a timing light for this. connect the timing light and locate the knock sensor, ( many are on the intake manifold ) now use a metal object to tap ( not too hard and not on the sensor itself ) on the intake manifold ( light tapping should suffice ), if the sensor is functioning you will see the timing retard. If the timing does not retard you will need to check voltage across the terminals of the knock sensor connector.

2008-03-01 18:54:24
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