Sled Driver

iTrader: (9)

In previous threads about the stock knock sensor, people responded with the values they had displayed. High, low & normal.
My question is; when the # its high, above 140 for example, wont the ignition be retarted & power output be less? Seams like it should do something more than just monitor sound & relay it in a voltage output.
So if you do have high #'s, after you retorque or replace the sensor. Should you redo you ignition maps to reduce the noise/knock readings?

spyfish007

stock ECU monitors it and does 4 degrees of retard
PFC does nothing but show you the reading

Also I had high readings on my PFC ... turns out the knock sensor was flat out shot.

Sled Driver

iTrader: (9)

Interesting. cause My sensor looks like crap. All the waxy stuff is melting & dripping onto the #1 leading spark plug. Im going to replace it & see if there is any changes in readings.
It good to know that It wont affect performance.
Thanks

FD Racer

Same here, theres like brown plastic tar melting down form it. The dealer wants alot for it, let us know if you find a good price for one.

spyfish007

I don't think it is worth the $180 price .... but that just might be me.

SPOautos

I think if I felt the need for a knock sensor I'd put that $180 toward a J&S that will actually do something besides take readings.

Later,