Knock sensor
11-04-2010, 02:47 PM
#1
6th Gear Member
Thread Starter
Join Date: Nov 2007
Location: Montaner
Posts: 6,193
Knock sensor
I'm trying to monitor this with livelink but I don't know what to make of the results.
Parameter IDs:
KNOCK_SENSOR_2_NOISE
KNOCK_SENSOR_NORMAL_RATE
KNOCK_SENSOR_RETARD_INCREMENT
I took a log of just normal driving no WOT stuff. The first value stays at 0 the whole time. The second one stays at 0 from idle but as soon as I begin accelerating it jumps up to 500 and stays there. The last value stays at 1.0 the entire time.
Any input? Thanks
Parameter IDs:
KNOCK_SENSOR_2_NOISE
KNOCK_SENSOR_NORMAL_RATE
KNOCK_SENSOR_RETARD_INCREMENT
I took a log of just normal driving no WOT stuff. The first value stays at 0 the whole time. The second one stays at 0 from idle but as soon as I begin accelerating it jumps up to 500 and stays there. The last value stays at 1.0 the entire time.
Any input? Thanks
11-04-2010, 03:27 PM
#2
5th Gear Member
Join Date: Oct 2009
Location: Oregon
Posts: 2,645
Going to guess on these since I haven't datalogged at all with the S197s.
Knock_sensor_2_Noise I believe is a counter or a flagger that tells you how much or how long knock is detected for.
Rate should be the speed at which it retards timing.
The third is more difficult for me to determine. Not sure what table the knock sensor uses to determine how much knock to pull.
This is what I'd be looking at though.
I'd be looking at the Knock-Sensor Noise counts, and when you see a value in there, compare it to the timing at that same time. You'll see how much timing the PCM is pulling to get rid of the knock. A tuner could then make that change static, so you no longer have to rely on the Knock sensor to make your timing right, it would be right from the get go.
Knock_sensor_2_Noise I believe is a counter or a flagger that tells you how much or how long knock is detected for.
Rate should be the speed at which it retards timing.
The third is more difficult for me to determine. Not sure what table the knock sensor uses to determine how much knock to pull.
This is what I'd be looking at though.
I'd be looking at the Knock-Sensor Noise counts, and when you see a value in there, compare it to the timing at that same time. You'll see how much timing the PCM is pulling to get rid of the knock. A tuner could then make that change static, so you no longer have to rely on the Knock sensor to make your timing right, it would be right from the get go.
Last edited by siggyfreud; 11-04-2010 at 03:36 PM.
11-04-2010, 03:41 PM
#3
6th Gear Member
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Join Date: Nov 2007
Location: Montaner
Posts: 6,193
Hmm this is kind of frustrating. It seems like if you aren't trained by SCT or have documentation on this then you'll be like a blind man trying to find your way home. How are we supposed to know what these values mean? They are so cryptic. 
11-04-2010, 03:50 PM
#5
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Location: Oregon
Posts: 2,645
.Hopefully SCT can help you a bit.
11-04-2010, 03:53 PM
#6
6th Gear Member
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Join Date: Nov 2007
Location: Montaner
Posts: 6,193
There are to many parameters for all the different cars they serve with their tuner devices. They don't have any idea what is what or how to interpret the results.
Seems like I need a s197 tuner with experience to explain this and help me get the right parameters in the config since I can't seem to figure this out on my own. Sucks being ignorant.
Seems like I need a s197 tuner with experience to explain this and help me get the right parameters in the config since I can't seem to figure this out on my own. Sucks being ignorant.
11-04-2010, 04:09 PM
#8
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Thread Starter
Join Date: Nov 2007
Location: Montaner
Posts: 6,193
lulz
I've posted them in OT before.
So what's up with this anyway? How did you guys take your own logs here? Did you have a tuner help you with this or did you figure it all out on your own? Because it seems like kind of a PITA.
I've posted them in OT before.
So what's up with this anyway? How did you guys take your own logs here? Did you have a tuner help you with this or did you figure it all out on your own? Because it seems like kind of a PITA.