Amazing video. Probably the best video regarding Knock, Knock Learn and DAM. You mentioned boost leaks and other mechanical issues, I currently have Fine Knock that ranges from -4 to -30 at times! Usually under partial throttle, from 2.5-3.5k rpm. 2013 sti. after investigating, it turns out that my turbo seals are bad, as I blow oil smoke on cold start. I dont smoke any other time, but being that turbo seals throw oil into your cylinder, it is definately reducing my 93 octane significantly to make my DAM trigger to .8 - .5 at times. Just a heads up, as I'm on my 7th revision with my tuner, and not once did he mention anything to me (etune). Just datalog, datalog, datalog. During the revisions, I was constantly monitoring my values, and I began troubleshooting because knock should not exist on a stock healthy motor with a catbak, fresh plugs, and delicious tuning coilpacks. Found a bad turbo causing it all (100k). Currently swapping my center housing out over holiday break to resolve the issue and monitor knock. An AOS will also help keep oil out of the cylinder and reduce knock, which will be done once I confirm the turbo being the culprit in my situation I hope anyone researching this because they dont know why they have knock will remember to inspect all aspects of their car. I didn't think I'd be dealing with a leaky turbo at only 100k but here I am. Thank you for taking to time to put this together. A+ content
Great video👍 I got my AP yesterday and I am getting very low readings on DAM as low as 0.065 😳😳 I’m taking it to my neighbor who owns a wrx as well to see if we can figure this out. Very concerning considering I bought the car 3 weeks ago
I’ve got my STI tuned on e85 and 91 map not flex fuel . I do get fine knock learn sometime 3.8 usually 1.4 my tuner looked at it and said everything is normal my DAM is at 1 which is perfect . But why do these numbers come up still I don’t understand. Please give me some input please
I do believe I explained every aspect of why knock happens and what the three different types of knock mean. I personally don't believe -3.8 fine knock learn is normal at all. The one exception would be if you have a fully built engine which can tolerate more knock. On a non-built motor though, any single knock event could take out your engine, especially if those fine learn numbers are down low in the RPM/high load range.
so quick question is recently had my knock sensor go out and i replaced it but my damn since then has been going from 16-14- 8-4 -0 which is horrible the knock numbers are fine could it possibly be that its not torqued to spec and not placed correctly or should i be worried it almost feels like i get fuel cut and then everything just jumps back up please help lol 2002 wrx
What could cause DAM ti drop and stay there? My DAM has dropped to 0.625 and I went through 3 tanks of gas still did not correct back to 1. Feedback knock and Fine Knock Learn are both 0 though. Only DAM is low. Its 2020 wrx all stock car just protuned. Yes, I asked my tuner but he couldnt figure out. He said its normal. But is it normal to be below for so long? Thanks!
@@IrisPPG Well he knows its below what it should be but he said it will bounce back after a while. But nothing has changed so I am thinking maybe there is something mechanically wrong.
Ugur's Garage it’s hard to tell, could be a number of issues. I had similar DAM dropping issue on 2017 FA20. I took off the intake, cleaned out MAF & MAP, then reflashed the same tune. It hasn’t dropped DAM again since. Could be dirty or worn MAF/MAP or 02 sensors, could be boost leak, could be something else.
@@wrxTO Your car has to experience many knock events under different driving conditions and is desperately pulling timing to protect itself from catastrophic failure... Dropping DAM is the last resort effort that cuts global timing across the whole power band. It only happens after the computer has already pulled timing from different areas across the power band.
Can having a blow off valve cause knocking or false knock and changes to fkc and flkc? I am in Kenya and my bugeye WRX 2001 run a gfb hybrid bov. When its open I get knock events while lifting off when shifting with always similar -2.11 degrees all but when it's closed even under load I don't get any fkc events at all. What's the issue likely to b NJi
When the BOV opens, the car also shuts off fuel injections as you let off so by definition it cannot knock. It's possible that if you immediately get on the gas right after but lightly, into cruise condition where the car is in closed loop fueling, it could over compensate for the rich condition from venting air by pulling fuel but it's very unlikely to happen every time. Ok the flip side, tip in knock is common regardless of BOV.
@@IrisPPG when I was putting the bov to vent to athmosphere I'd get a backfire and a knock alert that's why I said maybe it could cause it. Could it be the knock sensor registering the blow off sound as a knock or the backfire?
Actually a very good video. One of the more thorough and easy to understand explanations of Subaru knock I’ve seen. Thanks.
Thanks for watching!
Great video thanks for explaining. I’ve been having lots of anxiety since I recently purchased the AP..
Amazing video. Probably the best video regarding Knock, Knock Learn and DAM.
You mentioned boost leaks and other mechanical issues, I currently have Fine Knock that ranges from -4 to -30 at times!
Usually under partial throttle, from 2.5-3.5k rpm. 2013 sti.
after investigating, it turns out that my turbo seals are bad, as I blow oil smoke on cold start. I dont smoke any other time, but being that turbo seals throw oil into your cylinder, it is definately reducing my 93 octane significantly to make my DAM trigger to .8 - .5 at times.
Just a heads up, as I'm on my 7th revision with my tuner, and not once did he mention anything to me (etune). Just datalog, datalog, datalog. During the revisions, I was constantly monitoring my values, and I began troubleshooting because knock should not exist on a stock healthy motor with a catbak, fresh plugs, and delicious tuning coilpacks. Found a bad turbo causing it all (100k). Currently swapping my center housing out over holiday break to resolve the issue and monitor knock.
An AOS will also help keep oil out of the cylinder and reduce knock, which will be done once I confirm the turbo being the culprit in my situation
I hope anyone researching this because they dont know why they have knock will remember to inspect all aspects of their car. I didn't think I'd be dealing with a leaky turbo at only 100k but here I am.
Thank you for taking to time to put this together. A+ content
Great video👍 I got my AP yesterday and I am getting very low readings on DAM as low as 0.065 😳😳 I’m taking it to my neighbor who owns a wrx as well to see if we can figure this out. Very concerning considering I bought the car 3 weeks ago
Fantastic video! I am now terrified to drive my sti.
This was great, with the exception of the bird 🐦
Sorry, I'll be sure to put them in a box next time. 😂
Thanks a lot learned so much ✊🏼
Thanks for watching! ✌
@@IrisPPG quick question, fine knock learn says 0.00 then -2.46/0.00 but then changes to 0.00 from -2.46 is that normal,
Great info!! Most only state the definition lf these terms but not explain more in depth!
Thanks for watching. Glad I could help.
Hey man nice video! I’d love for you to take a look at my log stage 1 stock WRX 2017. Cheers
HOLY CRAP! You been there and got the T Shirt man. Is this a bad time for a Knock Knock joke?
Who's there?
please make more informational videos like this
I’ve got my STI tuned on e85 and 91 map not flex fuel . I do get fine knock learn sometime 3.8 usually 1.4 my tuner looked at it and said everything is normal my DAM is at 1 which is perfect . But why do these numbers come up still I don’t understand. Please give me some input please
I do believe I explained every aspect of why knock happens and what the three different types of knock mean. I personally don't believe -3.8 fine knock learn is normal at all. The one exception would be if you have a fully built engine which can tolerate more knock. On a non-built motor though, any single knock event could take out your engine, especially if those fine learn numbers are down low in the RPM/high load range.
Great video!!!
Thanks for watching.
Great. Vid man
Thanks for watching, glad it was useful.
Great video
Excellent video
Thanks for watching.
so quick question is recently had my knock sensor go out and i replaced it but my damn since then has been going from 16-14- 8-4 -0 which is horrible the knock numbers are fine could it possibly be that its not torqued to spec and not placed correctly or should i be worried it almost feels like i get fuel cut and then everything just jumps back up please help lol
2002 wrx
Do you have a bird? Lol I thought it was coming from out my window. 😅
Yes, two actually.
Much appreciated
I just went on a light drive to the store not pushing my car hard at all and out of nowhere my feedback knock shot up to -11
I've been chasing that same issue for over a year. Rev it up to 3k let it come down and bump the throttle and see if it knocks
What could cause DAM ti drop and stay there? My DAM has dropped to 0.625 and I went through 3 tanks of gas still did not correct back to 1. Feedback knock and Fine Knock Learn are both 0 though. Only DAM is low. Its 2020 wrx all stock car just protuned. Yes, I asked my tuner but he couldnt figure out. He said its normal. But is it normal to be below for so long? Thanks!
Your tuner said that... DAM dropping down to 0.625 is.. normal!?
@@IrisPPG Well he knows its below what it should be but he said it will bounce back after a while. But nothing has changed so I am thinking maybe there is something mechanically wrong.
Ugur's Garage it’s hard to tell, could be a number of issues. I had similar DAM dropping issue on 2017 FA20. I took off the intake, cleaned out MAF & MAP, then reflashed the same tune. It hasn’t dropped DAM again since. Could be dirty or worn MAF/MAP or 02 sensors, could be boost leak, could be something else.
@@jlarsen4 yes, none of those things are "normal".
@@wrxTO Your car has to experience many knock events under different driving conditions and is desperately pulling timing to protect itself from catastrophic failure... Dropping DAM is the last resort effort that cuts global timing across the whole power band. It only happens after the computer has already pulled timing from different areas across the power band.
Anyone else notice the birds chirping or am I crazy💀
Can having a blow off valve cause knocking or false knock and changes to fkc and flkc?
I am in Kenya and my bugeye WRX 2001 run a gfb hybrid bov. When its open I get knock events while lifting off when shifting with always similar -2.11 degrees all but when it's closed even under load I don't get any fkc events at all. What's the issue likely to b NJi
When the BOV opens, the car also shuts off fuel injections as you let off so by definition it cannot knock. It's possible that if you immediately get on the gas right after but lightly, into cruise condition where the car is in closed loop fueling, it could over compensate for the rich condition from venting air by pulling fuel but it's very unlikely to happen every time. Ok the flip side, tip in knock is common regardless of BOV.
@@IrisPPG when I was putting the bov to vent to athmosphere I'd get a backfire and a knock alert that's why I said maybe it could cause it. Could it be the knock sensor registering the blow off sound as a knock or the backfire?
rcs gang
**throws gang signs**
@@IrisPPG my dam went from 16 to 12 im big sad rn haha