Knock Sensor readings

[SHOdded]

A good reminder to consider all inputs into this complex electromechanical system ...

[BiGMaC]

Larry.... The tranny detective work is awesome!  The question I have about the KR is related to the sensor, which as you probably know, is just a microphone.  Do you think the tranny sends vibration or frank noise that the sensor/ECM interpret as Knock?

[SwampRat]

A good reminder to consider all inputs into this complex electromechanical system ...

that's a no shi**er !

[Larrylu]

Larry.... The tranny detective work is awesome!  The question I have about the KR is related to the sensor, which as you probably know, is just a microphone.  Do you think the tranny sends vibration or frank noise that the sensor/ECM interpret as Knock?

Wish I knew BigMac. In lieu of hard facts I'm making guesses that seem at least to make sense to me. The ECM  is very sophisticated and maybe more than the sound of pinging would go into the decision to throw a high KR. Maybe it's considering the interplay of sounds, temps, timing, load, and maybe even gear selection to actually prevent detonation. If gear selection is going screwy as in my case, a tranny sensor error might cause a calculation/value that would command the car to go into a protective mode. Maybe a good way for the car to pull timing is to throw out a high KR number. Always dangerous to be building a case for what and how based on so much assumption. Wish I knew more and was guessing less!

[FoMoCoSHO]

Larry.... The tranny detective work is awesome!  The question I have about the KR is related to the sensor, which as you probably know, is just a microphone.  Do you think the tranny sends vibration or frank noise that the sensor/ECM interpret as Knock?

Wish I knew BigMac. In lieu of hard facts I'm making guesses that seem at least to make sense to me. The ECM  is very sophisticated and maybe more than the sound of pinging would go into the decision to throw a high KR. Maybe it's considering the interplay of sounds, temps, timing, load, and maybe even gear selection to actually prevent detonation. If gear selection is going screwy as in my case, a tranny sensor error might cause a calculation/value that would command the car to go into a protective mode. Maybe a good way for the car to pull timing is to throw out a high KR number. Always dangerous to be building a case for what and how based on so much assumption. Wish I knew more and was guessing less!

I had some pretty bad wheel hop one night and threw a positive 6.5.

Hasn't happened since probably because a little torque management was added back in....

[ecoboostsho]

I know on my Grand Prix shifting could cause false knock. You could up the octane and it wouldn't go away (or if it did then it was real). I don't see this on my SHO though. When my knock gauge is reading numbers I usually believe it. That said I still only get appreciable knock at part throttle up a hill - almost never at WOT.

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[BiGMaC]

I know on my Grand Prix shifting could cause false knock. You could up the octane and it wouldn't go away (or if it did then it was real). I don't see this on my SHO though. When my knock gauge is reading numbers I usually believe it. That said I still only get appreciable knock at part throttle up a hill - almost never at WOT.

Yea... I get that, kinda does the same thing on easy acceleration... Lugs easy.  Makes me use the throttle briskly and then let go...