Unbootable

how do you guys monitor the knock retard ?

I looked in cipher but I couldn't find any selection , Any software or logging tool ?

balaguru

iTrader: (2)

You can monitor knock strength using the ROM editor. It's not listed within the standard Cipher parameters.

Unbootable

Thanks for the reply,

Unfortunately I don't have the tuner version of Osiris, But how about back probing the knock sensor signal wire, Will it give an accurate voltage reading or at least show me what's going on ?

balaguru

iTrader: (2)

See http://uprev.com/documentation/Knock...n%20Device.pdf

djamps

iTrader: (1)

You can't log retard... just 'strength' which doesn't mean much of anything. Best to listen in yourself for knock using the aforementioned article.

Unbootable

Thanks for the info / diagram guys, But I think the KS will be picking up all kind of noises and it's not easy for some to differentiate between real and false knock.

The FSM states that the KS voltage should be about 2.5v ( I think this is the no knock zone ), So using a voltmeter is still a good idea but I will not be able to translate the voltages to degrees !!!



I do believe that my ECU is pulling timing and causing me performance and MPG,

Is it normal for the ignition timing to be about 30:33 degrees while cruising at high way speeds ( doing 60 : 80 mph in 5th gear for example ) and it drops to about 27 if I give it a lil bit of gas ( it bogs down pretty bad at this point ) ?!!!

balaguru

iTrader: (2)

The KS is basically just a microphone. I don't think you'll get anything meaningful from it using a voltmeter. Low on my list of prorioties is to write an android app to allow me to plug the signal into the mic on my phone and log/display a knock count. If anybody wants to beat me to it, then knock yourself out -- pun intended. I'd pay $5 for an app like that.

This is what I saw when I logged my stock G35 and it ran fine.

Unbootable

Weird, I have always thought that it should be in the high 30s to low 40s ( between 37 to 43 ) .

One thing, My base ignition timing is dead on 15 degrees ( in Neutral ), But it drops to 10 and some times to 9 when I put it in gear, And the car takes off like a pig, is it normal ?!!!

HOODEY

I have done a lot of work on knock detection.

Once i have an understanding of the cam and crank signals I can determine the amount of knock, ignition timing and which cylinder is knocking in real time.

Unbootable

Update,

So i replaced my knock sensor with a 560K Ohm resistor just to make sure that my theory was right. And now the car runs like a DREAM, No more bogging ( especially after warm-up ) , No more jerking at shifting points,,,,

My timing used to be about 9 degrees when the car is idling in gear, Now it jumps to over 22 degrees. So i'm sure that little b!tch was pulling away over 10 degrees of timing !!!

Now my question,

Did any one re-located the knock sensor, How safe it's ?

amr_electron

iTrader: (8)

Why do you want to relocate the knock sensor ?

First make sure that the car is not pinging and you don't have any metal rattle like an exhaust hitting the frame or the sway bar, Then replace the sensor if you think that it's over sensitive.

350z006

iTrader: (79)

There have been multiple instances where the know sensor has been detecting false knocks with noisy built engines/FI....my tuner disabled my knock sensor using osiris for the hero tune, not sure why you had to use a resistor in your case...