Dears,
I would like to know how to benefit Knock Sensor in my Diagnosis. Is there a way that I can benefit it? Any video on Knock sensor value change and what does high and low value indicate? what is normal range in diagnosis?
I will move this into Diagnostic Tools and Techniques section.
To answer your question the short answer is a knock sensor won't tell you much.
A knock sensor is simply a piezo crystal micorophone that is tuned only to react to a quite narrow range of sound vibration frequencies usually between 8,000 and 17,000 hz.
The frequency is tuned to the sound of pre-ignition pinking or pinging in north America. The frequency of the pinking/pinging is different for each engine and largely depends on cylinder bore - big bore engines lower frequency, small bore engines higher frequency.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
