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Discussion Starter #1
Hello, I recently installed a JLT CAI and Steeda Tune on my 2013 GT. The tune has only been on the car for about 30miles and i decided to log some data to ensure nothing looked too crazy. I noticed the knock sensors were giving readings, even at WOT, which concerned me. As you can see, this first recording shows knock sensor readings of -5deg to nearly 4deg. I recorded a few more WOT pulls after this and all values were between -4 to 0. I am unsure if this is normal/excessive or if this is possibly just due to the car learning the tune and i need to give it some more time.
 

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according to what Ive been learning lately, - actually means it is adding timing, and + means it is taking out timing, yeah odd I know
 

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Your tuner should ****** the knock sensors by a half degree to 1 degree.
Who is your tune by?

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Discussion Starter #6
I believe redline is 7k.. i haven't taken it above 6500rpm at the moment. Being that the tune is still new to the car and the car needs to learn/adjust, I am probably OK knowing Steeda's reputation with a "safe" tune. I mostly wanted to determine if there is a dangerous level of knock that I should keep an eye out for (I have friends with turbo 4cyl who don't like anything above 5deg - that is a significantly different application though of course!). I plan to put a bit more mileage on it over the next few days and do some more recordings.

I have sent two data files to Steeda and will see what their thoughts are. Quick picture of my second recording. Looks like knock values stay between 0 and -4deg.. also looks as though the knock value reduces after doing a few pulls to around -2deg... Makes me think the car just needs to get educated a bit more before worrying :D
 

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did you even read my reply???? the - minus means timing is being added while the + positive means timing is being pulled therefore your log is showing timing being added, meaning the ECM saw no knock and added some timing for more power
 

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Discussion Starter #8
Scott, not disagreeing with you or saying you're wrong. Is anyone else able to confirm this? It seems odd to me that the ecu would make adjustments because it doesn't sense knock, but maybe that's how it works..

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Never heard of that whatsoever. Your pcm is not going to add timing on its own. Every degree of timing is critical on these cars. So the pcm adding it automatically could be a disaster.

My knock sensors are completely turned off in my tune. And not once has it ever added timing automatically 😉

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Not to mention does not make sense either. You have to add timing manually does not do it on its own.

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Scott, not disagreeing with you or saying you're wrong. Is anyone else able to confirm this? It seems odd to me that the ecu would make adjustments because it doesn't sense knock, but maybe that's how it works..

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Never heard of that whatsoever. Your pcm is not going to add timing on its own. Every degree of timing is critical on these cars. So the pcm adding it automatically could be a disaster.

My knock sensors are completely turned off in my tune. And not once has it ever added timing automatically 😉

Sent from my HTC One using Mustang Evolution mobile app






Not to mention does not make sense either. You have to add timing manually does not do it on its own.

Sent from my HTC One using Mustang Evolution mobile app
doesn't make sense to me either fellas, but research it, you'll find the same info I found. it's up to the tuner how much timing can be added if no knock is detected



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doesn't make sense to me either fellas, but research it, you'll find the same info I found. it's up to the tuner how much timing can be added if no knock is detected



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My knock sensors are completely deactivated. Never once has my car added timing automatically.

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Discussion Starter #13
I'm with Rapinator on this on.. adding timing "just because it can" doesn't make much sense to me. There wouldn't be a need to have specific tunes for specific octane levels if that were true. Still waiting on a reply from Steeda to see if this is normal. I tried to datalog the stock tune w/ stock intake, but unfortunately didn't realize that the x4 tuner only saves the most recent tune :banghead: . So I can't compare to that as a baseline.
 

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Just asked my tuner. He said "there is multiple timing tables, but it should not randomly start adding timing"

So I'm not sure where you got your info from, but like I said does not make since

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Discussion Starter #15
I agree.. Still waiting on a reply from Steeda. I will try calling them after work. If they don't respond this afternoon, i may throw the stock intake and tune back on the car to get a baseline. Limited hassle and good information to have. I was just hoping someone else may have looked at or had similar recordings as this for comparison. Or that Steeda would comment on it :D
 

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Discussion Starter #17
Still no word back from Steeda.. Another data log. Seems as though the knock is peak at WOT, which is never good. May leave the car at home until i can get some answers. Car seemed to drive better with stock intake and steeda 93 tune, but if this is all part of the car learning, I don't want to start all over :confused:
 

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Discussion Starter #18
So I decided to put the stock intake and tune back on the car and log some more data. I figured I'd post the results. Turns out the car knocks at WOT even with the stock intake and tune. Makes me feel slightly more confident that my car won't explode.:thumb:
 

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Hummm...a stock tune should not be knocking at WOT, we need to know just what you are reading here. what is the PID of your knock sensor?
 

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Hummm...a stock tune should not be knocking at WOT, we need to know just what you are reading here. what is the PID of your knock sensor?
just why do you think the knock sensors are there? there are times when the fuel we use is not the best quality, or exreme heat, engine is heat soaked etc. it's silly to think stock tunes don't knock........

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