2017 wrx ( fine knock learn)
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- Опубликовано: 3 окт 2024
- coming back to an issue I've had in the past . stay and watch the whole vid please. there is something with this and it's starting to get annoying. very strange I've never seen another vid on RUclips or post of anyone with this issue . I'm also not knocking the tuner that emailed me, just stating that was his fast response and nothing else. for him to say it's normal and always going to be there I've never seen another vid on this lol. thanks
For anyone who doesn’t know. The feedback knock is the realtime knock value, the knock learn is corrections to mitigate the knock. The DAM is the range of timing your engine has to play around with.
2002 wrx... I get a 4.22 usually. Lowest is .35 but I drove around today and it only does it at a certain throttle position. Like barely on the gas, just enough to keep it at the same speed. But today I held it at that same throttle position (just got over it and was gonna see what happens 🤷♂️) and it adjusted and I watched the fine knock learn drop every second or so. Went from 4.22 to 3.8sum the low 3, high 2 and so on. Eventually it corrected itself and stayed at zero. Idk wtf is causing it. I know the car is due for plugs and stuff. Oil change is always done at 3k miles or even a little sooner but idk.
Sameeee did yu ever fix it
I got the same issues. Mine hit .9 the other day. I’m going to flash the 91 tune.
Seems totally fine, especially being as FA20 wrx's have two knock sensors and they are direct injected engines which are more prone to knock events (sometimes false knock). Also there was a recall for thw knock sensors themselves on the fa20's. Check out a video from "flatirons tuning" in which they sit down with a very knowledgeable & articulate tuner. He goes in depth regarding feedback knock, fine knock learning, and DAM (dynamic advance multiplier) . You are monitoring that on your accessport, i can see. And its at "1.00" .. which is great. That where it should stay, so id say, dont freak out and watch the video i just suggested.
I appreciate the comment. Unfortunately, my issue is most likely the carbon build-up on the valves . It didn't do this for 3 years and started getting worse from this video all the way up till now. I thought it was the tune , I was wrong, plugs, mas aur flow sensor, leaks, everything you can think of, and I was wrong. I've narrowed it down to needing the walnut blasting. But unfortunately, lovely subaru doesn't offer that as a maintenance, which they should like BMW and other car companies. As for the knock sensor being what's year was that cause I've looked my Vin up many times and never had that pop up. Do you know what year that was ? Last it does go down from one, all the way down to stock numbers which are 688. Goes back up on long drives and when I dip into the throttle. Got to the point where I just ignore it and say whatever now cause until I find a shop that does the cleaning I can't do anything about it.
Are you stock for the most part, as far as performance parts are concerned or built engine? You will most likely get rid of carbon build up on valve using a bottle of seafoam. Run it through a vac line, the engine sucks it up, smokes alot, then fill up and drive after the smoke dissipates.
Having same kinda issue, I’ve changed the spark plugs 2x with less then 5k on first set and 1k on second set. After watching ,
ks noise, im getting high readings from cylinder 1 & 3. I’ve used COBB stage 0 & 1 tunes with same issue of feedback knock and fine knock at low rpm’s. I’ve brought it to a shop and they couldn’t replicate and was told everything was within normal and no issues. But I know for sure something’s up and can’t figure it out
Dang man sorry. I cleaned my mass air flow sensor and a few other things to try and narrow it down. I'm gonna do a compression test this sat and if it goes good I have an appointment at a shop that tunes and works on nothing but these cars. So hopefully they can find out what's going on. 6 years never ha feedback knock and fine knock learn like this . All started to get worse when I got 14 gallons in gas from wah wah. Not saying that's the issue but damn the knock I'm getting at wot and the sound is horrible. If I drive normal and everything thing else , it doesn't make a sound. It's pissing me off
@@somersfamily the weird thing is my 18’ doesn’t have any noticeable issues during the times the gauges spike. I know my a/c compressor/bearing is starting to go and needs replacing. But dove to work today with it off and still got -6.33 fine knock learn but without and feedback knock. So I’m confused as hell as why there is not feedback knock during most of the times I have fine knock learn readings. I religiously change oil every 3k, don’t beat on her, air filters changed 5k miles ago, aos. I might try new coil packs or fuel injectors next. Please update after compression test. That has crossed my mind more then few times.
@@mEtALmAN1486 I'm checking the plugs and coils on Sunday even though I did the plugs last Oct. A buddy at work hooked up his computer and it read I have a misfire in cylinder 2 which is the side I'm hearing knock in. So trying to run the gas out I bought when all this happened and check the plugs. Cobb told me is may be carbon buildup and I might need a walnut blast. But the dealer charges 600 for that.
@@somersfamily I changed all 4 plugs at 34k, and just changed both cylinder 1/3 @39k miles. I’m probably going to change the coil packs and see if that does anything. It’s only giving issues when I get on her, any higher the 7-8# boost. AF ratio seems good, but still getting a lot of KS noise from the right side of engine (cylinder 1/3).
@@somersfamily you figure out the cause?
I would try flashing to the 91 Octane tune if you're currently on the 93. I was getting some very erratic FKL and DAM would never reach 1 as my commute is also relatively quick stop and go. Flashed to the 91 tune and DAM hasnt moved from 1 and I've only ever gotten the typical -1.4 FKL during hard pulls. Best of luck
Hi Eric, another thing you can try doing, is try the 91 Octane Stage 1 tune. A lot of people who experience issues like this say lowering to a lower Octane tune fixes the issue. I would try that, and also do try the regular Cobb tune as well, if the issue still remains with MAP 91 Octane tune. That's really the only other thing I can think of trying if you haven't already done that.
Thanks buddy. It's really annoying cause it comes and goes only at that rpm. I wish I could just floor it all the time but unfortunately I can't lol. Thanks ad always dude. I'll keep you updated and see what each do.
Also maybe a stupid question. But if I put on the stage 1 91 tune can I still get 93 octane or do I just stick with 91 octane? I think I could go with a higher octane but just wasn't sure
@@somersfamily Yeah generally you'll still use 93 Octane fuel. In my area the choices are 87, 89, 93 so yeah you would still need to use 93, as 89 is still too low. And even on the stock tune, premium fuel is still required. I'm running a 91 tune on my Accord, so I'm stll paying for premium 93 Octane fuel though. Normally though my vehicle runs fine on 87 Octane gas while not tuned.
@@LousWRX thanks buddy. I'm gonna wait for the heat to cool down and check for loose nuts and bolts to. Cause when I start it up I hear a slight rattle in the exhaust system . So maybe it's just a clamp or something loose I'm hoping that's causing a sound and vibration at that certain rpm. Thanks again pal
@@somersfamily No problem glad to help. And that might be s good idea. Oh, The Batman comes out next Tuesday, I'll be definitely picking it up. I haven't watched it yet, but definitely want to add it to the Batman collection of movies. I'm sure you saw it though! 🦇
My fa wrx does the same when it's time to clean the MAF sensor.
Hopefully this clears my issues too.
Sounds like the tune to me, my first iteration of my etune actually made my FKL worse, no dam drop or anything like that, after 3 revisions the most FKL I see is -1.40/-2.80
Yeah me too I get the same numbers ever find out the problem
Pcv issues can cause knock also. Notice any oil consumption?
I have a 16 sti. Full exhaust and pro tune at 20k miles and just hit 100k. I never had trouble with my fkl until a couple of months ago it started spiking to around 5- 7 here and there. I'm not sure if it's coincidence or not, but I just spun a rod bearing 😢
Damn dude that sucks. My issue will never be figured out, I think. I'm pretty sure it's the carbon build-up on the valves, and lovely subaru doesn't offer a maintenance like BMW does for that, which is a joke cause it's an issue with the fa's. I called a shop that was supposed to do it, and the guy ended up ghosting me. I got to the point where I don't care anymore cause I've been dealing with this for over 2 years now and if it does down in dam and I have weird fkl I just drive a certain way for a few minds and it goes back up.
@somersfamily Yeah, mine is going to sit in the garage for a while, while I save up for IAGs 550 short block and other mods and shoot for 400whp.
Hopefully, your situation doesn't go south like mine did. Yeah, subaru definitely is a little shady . Just like the warranties only go to 100k, 100k is when I need to do timing belt, pulleys, and water pump. Fuckers lol
My car what’s doing the same when I was on a OTS tune and then I got my car dyno tuned at the shop by me it has been fine since no problems
I'm doing an updated video that's like 20 minutes long . Its uploading right now
im having the same issue with my protune and I have seen worst with mine and I have been fighting with my car. its only at low throttle and I have no idea why. my shop has been trying to figure what is going on and my dam will drop quick so they are gonna try to tweak tune for me but its blowing my mind and I have been dealing with this for 6 months. My car has a bunch of mods and they told me the more mods you throw at it the harder it is to fight knock events.
I’m having the same issue with my 2015 wrx. My fine knock is high between the same rpm’s which results in a dam drop. My dam will drop as low as .500 and will come up to .812 but I can’t ever get it back to 1.000 dam
I’m having that same problem, did you figure out what was causing that
U prolly had engine leak somewhere
Just disconnected access port out lol
If I did that I wouldn't have known that my valves were that dirty from our lovely dit. It showed me something weird going on. Even after putting it to stage 0
Check for vacuum leaks
Your car is cold
Hey brother sorry if this is late but did you ever figure out what was wrong I get the same issue when I hit 2500 rpm
I made a vid on it. I'm gonna upload it, But im pretty sure I have a good idea what it is by doing some research on it. How many miles are on your car ?
If I'm wrong with what the issue is I'll just have to move on to the next thing. But from the research I've been doing and some other tuners and techs, it might be the carbon build up.
@Somersfam im thinking i have the same problem. But its sooooooooo inconsistent
months to get your DAM back up? why dont you just reset ECU learning ....?
Cheap gasoline
It's not the fuel, nor was it ever. I've tried and got gas from Shell for a year straight. Does nothing. The problem is carbon build-up on the valves from the lovely direct injection
any update since then? i’m having issue with my DAM too.
And me too.. car sounds and feels good. Going to clean maf sensor and change plugs.
What ended up being the resolution to this? I got this weird issue as well
I ha e this problem with my 2.0 2002 wrx
I hated my map e30 e tune. Once I went phatbotti I was good. Get a retune thru taylordtuning.
What's weird is I contacted him about this to see if the e tune would help and he wrote me back that I will always get cruise knock no matter what with the fine knock learn. So I backed off. I went to his site many time and no where on his info does it say that. So it got me confused. Kind of weird it's doing this more and more the last year then it has before. Never have any feed back knock on wot. Just this garbage lol
@@somersfamily I had the same experience even called them too but I couldnt trust them so I parked my car until I got it retuned and never ever had a tune problem again.