Quote:
Originally Posted by camaro5
^ The PCM is ALWAYS pushing the timing advance to allow a slight amount of detonation.
The value of the piezo-electric sensor is seen by the PCM as a voltage.
Higher voltage means more det.
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Very useful, thankyou for the contribution. I was unaware the computer would essentially squeeze every last bit out of the available octane.
I interpret from your reply that the PCM will interpret anything beyond a certain voltage threshold (as read by the piezo electric sensor) as detonation. The higher the voltage beyond this threshold, the more the detonation. This should be easy to monitor (with the right equipment) and therefore settle on a grade of gasoline appropriate for the driver wants to achieve.
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