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Parts Glossary |
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Glossary of Automotive Components/Terms
A sensor mounted in the engine block that senses the type of
vibrations given off by cylinder detonation (pinging). When the on-board
computer sees signals from this sensor indicating detonation or pinging it
retards ignition timing to try and eliminate the problem.
This sensor is capable of picking up pinging even before it becomes audible to the ear. However, if it the computer is constantly retarding timing to prevent pinging, performance and mileage will suffer. This can lead people to think they can burn a lower octane or poor quality fuel just fine when it actually can be affecting the car.
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Wayne's Garage
27 E 27th in Eugene, Oregon
333 Q Street in
Springfield, Oregon