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2011-2014 Mustangs
Engine/Tuning
Data Logging
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<blockquote data-quote="mjohns930" data-source="post: 14044515" data-attributes="member: 138669"><p>Alright. I have made some logs and I am trying to figure everything out. There are a couple PIDs I need explained to me:</p><p></p><p>Knock Sensor - I know what the knock sensor is/does, but I want to make sure I understand the read out in the data log. I get positive and negative values and I am assuming that is how much timing it is adding or subtracting. Am I on the right track with that?</p><p></p><p>Spark Advance and Spark Advance v2 - I know this is ignition timing, but why two? Is one commanded and one actual? What is what here?</p><p></p><p>Lambse 1 & 2 - This is obviously AFR as lambda, but there is also Measured AFR 1 & 2. So is this commanded lambda? Also, how do I calculate a regular AFR (12:1 for example) out of this if I am on E10 gas?</p><p></p><p><a href="https://www.dropbox.com/s/ij2mtwnixswt80p/log1.csv" target="_blank">Here (link to my Dropbox)</a> is a link to one of my data logs doing a WOT pull from 2000-6800rpm in third gear (auto). If anyone could take a look at it and answer a couple questions for me that would be awesome. </p><p></p><p>In the 2300-2800rpm range the knock sensor looks like it pulls some timing and then starts going back up to zero. Then there at 5000rpm it looks like it adds a little and then goes back to zero. Not sure I understand why that is happening since I can't see it pulling or adding timing at those spots, then again, I am not 100% certain of everything I am looking at. So what does that mean?</p><p></p><p>Then, from 3900rpm on up the spark and spark v2 take a lot of dips. It is really bad from 3900-5500rpm. Why is that happening? I don't see anything happening on the knock sensor, so that leads me to believe it might be tune related. </p><p></p><p>Thanks for taking the time to read all this, and thanks in advance for answering any of the above questions.</p><p></p><p>Mitch</p></blockquote><p></p>
[QUOTE="mjohns930, post: 14044515, member: 138669"] Alright. I have made some logs and I am trying to figure everything out. There are a couple PIDs I need explained to me: Knock Sensor - I know what the knock sensor is/does, but I want to make sure I understand the read out in the data log. I get positive and negative values and I am assuming that is how much timing it is adding or subtracting. Am I on the right track with that? Spark Advance and Spark Advance v2 - I know this is ignition timing, but why two? Is one commanded and one actual? What is what here? Lambse 1 & 2 - This is obviously AFR as lambda, but there is also Measured AFR 1 & 2. So is this commanded lambda? Also, how do I calculate a regular AFR (12:1 for example) out of this if I am on E10 gas? [URL="https://www.dropbox.com/s/ij2mtwnixswt80p/log1.csv"]Here (link to my Dropbox)[/URL] is a link to one of my data logs doing a WOT pull from 2000-6800rpm in third gear (auto). If anyone could take a look at it and answer a couple questions for me that would be awesome. In the 2300-2800rpm range the knock sensor looks like it pulls some timing and then starts going back up to zero. Then there at 5000rpm it looks like it adds a little and then goes back to zero. Not sure I understand why that is happening since I can't see it pulling or adding timing at those spots, then again, I am not 100% certain of everything I am looking at. So what does that mean? Then, from 3900rpm on up the spark and spark v2 take a lot of dips. It is really bad from 3900-5500rpm. Why is that happening? I don't see anything happening on the knock sensor, so that leads me to believe it might be tune related. Thanks for taking the time to read all this, and thanks in advance for answering any of the above questions. Mitch [/QUOTE]
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