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Old 05-24-2018, 07:58 PM   #1
evans312
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Default Crazy Knock Readings WOT

Since it started getting warmer, I have noticed some crazy numbers WOT, it does vary though. Some days it gets up to -8, some days only -3. I'd love to blame it on bad gas, but I don't even know at this point. The knocking normally is little at around 4-5k but when it gets to 5-6k is when I get the big numbers. I feel a slight shutter or lag when doing a pull. However, my dam only drops when cruising or at a really low load, which is understandable. Has anyone else experienced anything like this or might know whats up?
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Old 05-24-2018, 09:12 PM   #2
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Knock during WOT is REALLY bad. I would cease doing pulls immediately until someone more knowledgeable on this forum can advise you.
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Old 05-24-2018, 09:18 PM   #3
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Log??
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Old 05-25-2018, 04:03 AM   #4
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Originally Posted by simpleJ View Post
Log??
Here is a 3rd gear pull log, I believe this should work.

https://docs.google.com/spreadsheets...it?usp=sharing
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Old 05-25-2018, 04:50 AM   #5
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Quote:
Originally Posted by evans312 View Post
Here is a 3rd gear pull log, I believe this should work.

https://docs.google.com/spreadsheets...it?usp=sharing
You need to log the command afr options including the one for cl.

From the looks of what you have logged you tune is very lean compared to most logs I have seen. You should contact your tuner asap.
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Old 05-25-2018, 01:24 PM   #6
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Originally Posted by Schoat333 View Post
You need to log the command afr options including the one for cl.

From the looks of what you have logged you tune is very lean compared to most logs I have seen. You should contact your tuner asap.
Itís an ots map, do you think a cat less setup would cause these problems?
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Old 05-25-2018, 01:40 PM   #7
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Originally Posted by evans312 View Post
Itís an ots map, do you think a cat less setup would cause these problems?
Lol yes.
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Old 05-25-2018, 01:46 PM   #8
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why would a catless setup lean it out?
It's metering the intake air no different.
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Old 05-25-2018, 01:58 PM   #9
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So you're running a Cobb Big SF intake?
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Old 05-25-2018, 03:06 PM   #10
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So you're running a Cobb Big SF intake?
Yes I am
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Old 05-25-2018, 03:07 PM   #11
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Lol yes.
I mean they say on their website that you can run a cat less setup, though it is reccomended to run catted. Iíve only been running catless temporarily
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Old 05-25-2018, 03:08 PM   #12
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Is this a troll? Because you broke two cardinal rules.
1. Never use the Cobb Big SF intake as it's a b1tch to tune and will be messed up unless you position the filter perfectly each time.
2. Cobb OTS maps only work should be used with CATTED J pipes.

Edit: Cobb's site actually says it will run but not recommended due to boost creep and CELs.

Last edited by sth36; 05-25-2018 at 03:24 PM.
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Old 05-25-2018, 03:21 PM   #13
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hi, welcome

you screwed up

step back
educate yourself
stop being a bro
pay off your car before you blow it up
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Old 05-25-2018, 03:39 PM   #14
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sory i was looking for help, didnt mean to offend anyone, just wanted to know if anyone had similar problems/fixes. sorry
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Old 05-25-2018, 03:59 PM   #15
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Quote:
Originally Posted by evans312 View Post
sory i was looking for help, didnt mean to offend anyone, just wanted to know if anyone had similar problems/fixes. sorry
You didn't offend anyone, but no one here wants to see your car blow. Intakes of any make seem to be nothing but noisemakers and come with inherent problems (trust me, I had one and went back to stock). The Cobb unit has the most variability and is probably the last intake to be recommended by any tuner, at least that's the general consensus.

Secondly, back when I was running an OTS tune, I was under the impression they were created for catted j pipes. They may work with a catless set up, but that doesn't mean it's going to be good for your car. I'd expect CELs, overboosting, and the often mentioned boost creep.

Best advice you can take away from all of this is READ READ READ. Ron Watson (Phatron) has a website that tells you all his recommended parts. I don't know a single person who would suggest that everything on his site isn't really good and accurate info so take a look at recommended parts and his FAQs.
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Old 05-25-2018, 04:07 PM   #16
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Quote:
Originally Posted by sth36 View Post
You didn't offend anyone, but no one here wants to see your car blow. Intakes of any make seem to be nothing but noisemakers and come with inherent problems (trust me, I had one and went back to stock). The Cobb unit has the most variability and is probably the last intake to be recommended by any tuner, at least that's the general consensus.

Secondly, back when I was running an OTS tune, I was under the impression they were created for catted j pipes. They may work with a catless set up, but that doesn't mean it's going to be good for your car. I'd expect CELs, overboosting, and the often mentioned boost creep.

Best advice you can take away from all of this is READ READ READ. Ron Watson (Phatron) has a website that tells you all his recommended parts. I don't know a single person who would suggest that everything on his site isn't really good and accurate info so take a look at recommended parts and his FAQs.
thank you for helping. god bless, ill be gooing back to catted and stock intake today, might be to late but worth a try
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Old 05-25-2018, 04:56 PM   #17
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Why is it that people just add intakes and other mods without doing proper research? I researched for months before even doing any shifting mods. Do you guys use condoms? Or just wake up the next morning saying "**** it" Putting random parts on the car, without proper tune, is like getting a girl pregnant, off a one night stand. Now you have a headache/financial stress, for most of your adult life, that you didn't have before.

Aren't you scared that, adding random parts to the car, can indefinitely destroy the car?

Not pointed at OP, but I see this ALOT on the forums.

uhhh good luck.
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Old 05-25-2018, 05:27 PM   #18
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It's running very lean for some reason and not because you are catless...
All I can suggest is clamp the air filter closer to the edge of the intake pipe and make sure it is straight. Clean your MAF sensor and make sure that is seated correctly.

Are there any other mods you didn't mention?
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Old 05-25-2018, 05:36 PM   #19
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Just take the intake off and sell it for few bucks. Keep the rest of the parts, stay out of boost and get an etune ASAP from a reputable tuner. If you haven't heard an audible knock, the engine still maybe OK.
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Old 05-25-2018, 05:48 PM   #20
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Quote:
Originally Posted by tegxsi View Post
It's running very lean for some reason and not because you are catless...
All I can suggest is clamp the air filter closer to the edge of the intake pipe and make sure it is straight. Clean your MAF sensor and make sure that is seated correctly.

Are there any other mods you didn't mention?
Just a full turbo back, intake and full recirc bpv.
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Old 05-25-2018, 05:49 PM   #21
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Originally Posted by Straight6 View Post
Just take the intake off and sell it for few bucks. Keep the rest of the parts, stay out of boost and get an etune ASAP from a reputable tuner. If you haven't heard an audible knock, the engine still maybe OK.
Do you have any recommendations for tuners?
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Old 05-25-2018, 05:59 PM   #22
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Quote:
Originally Posted by evans312 View Post
Do you have any recommendations for tuners?
Ron Watson or Bren.

Also, read this when you have some free time:

https://phatbottituning.com/2014%2F15-wrx-instructions

These engines are very sensitive to modifications and really benefit from custom tuning.
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Old 05-29-2018, 07:56 AM   #23
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Quote:
Originally Posted by vlad11591 View Post
Why is it that people just add intakes and other mods without doing proper research? I researched for months before even doing any shifting mods. Do you guys use condoms? Or just wake up the next morning saying "**** it" Putting random parts on the car, without proper tune, is like getting a girl pregnant, off a one night stand. Now you have a headache/financial stress, for most of your adult life, that you didn't have before.

Aren't you scared that, adding random parts to the car, can indefinitely destroy the car?

Not pointed at OP, but I see this ALOT on the forums.

uhhh good luck.

Lol.
I bought my Cobb AP from a kid who had a cvt wrx with catless Jpipe, cobb intake and nameless axleback.

When I asked him what he was going to do with his car since he was selling the AP, and if he was going to go back to stock.

He said nope. he was just gonna run it like that cuz he needed moneys.

I diddnt argue because I got his AP for $320 and it was 2 months old lol.

He let out a sick cloud and rolled out full throttle.

vape life
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Old 05-29-2018, 09:47 AM   #24
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Quote:
Originally Posted by vtwinjunkie View Post
Lol.
I bought my Cobb AP from a kid who had a cvt wrx with catless Jpipe, cobb intake and nameless axleback.

When I asked him what he was going to do with his car since he was selling the AP, and if he was going to go back to stock.

He said nope. he was just gonna run it like that cuz he needed moneys.

I diddnt argue because I got his AP for $320 and it was 2 months old lol.

He let out a sick cloud and rolled out full throttle.

vape life
Probably needed to pay his child support
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Old 05-31-2018, 12:23 AM   #25
zachreny
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Mishimotot cold air intake with box also have protons done by bren
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