what does this do.......

[RedRyder]

The knock sensor is a microphone for the ecu. If it hears the engine knocking, the ecu will pull timing to stop that from happening. Eventually, the ecu will slowly add that timing back as you continue driving. The knock sensor has no other function, and can not advance timing.

To answer your question above, timing is where the power is. First you get the A/F where you want it using a wideband, then you start advancing the timing little by little. You stop when it either knocks, or stops making power. A knock sensor is helpful when tuning because you can see where the ecu thought there may be knock, and pulled timing. That will show up as a dip on the power graph.


That is a very shortened version of how the knock sensor helps when tuning.

Thanks for posting that, very interesting. I alwasy wondered what exactly a knock sensor was, just never looked it up for some reason. Amazing how it plays a role in tuning.

 

[inv4zn]

Not to hijack, but how do you know if the sensor is broken?

I didn't know it was this fragile, and I'm sure i've bumped it more than a few times..

Edit: Ugh. Stupid question; It will throw a code...hahaha sorry =(

 

[Russianred]

I gotta grab a new one too, mine broke off earlier.

 

[Erik123456789]

I gotta grab a new one too, mine broke off earlier.

Lol knocksensors are almost as bad as tps sensors. I've broken my tps sensor twice. :X

 

[Atreidies]

Lol knocksensors are almost as bad as tps sensors. I've broken my tps sensor twice. :X

That's b/c you didn't file a tps report after you broke the first one.

 

[Russianred]

^^^

!!

I'm glad P28 ECU don't account for the knock sensor, therefore I have no real need to replace it, unless I upgrade to a P72 in which the knock sensor function is available for tuning.

 

[Erik123456789]

^^^

!!

I'm glad P28 ECU don't account for the knock sensor, therefore I have no real need to replace it, unless I upgrade to a P72 in which the knock sensor function is available for tuning.

lol same here