Normal driving it really isnt a big deal. And positive knock isnt really bad depending. As long as your not seeing positive at WOT. You might see a positive spike then it go down to 0 or in the negatives.
Is feedback knock okay?
In general, we consider Feedback Knock Correction ~-2.5 degrees or less to be “normal” and not of major concern. If DAM is below the ideal value and there are corrections beyond -2.5, this is good reason for further inspection.
What causes knock WRX?
The Octane Level of Your Fuel Is Too Low Premature combustion causes a knocking sound. While most Subaru models only require 87-octane fuel, some models like the WRX and the BRZ require higher-octane fuel. If you notice this kind of knocking, buying an octane booster might help the issue.
What is Cobb fine knock learn?
Fine Knock Learning: This value represents minor learned corrections currently being applied by the ECU as a product of historical noise.Feb 7, 2020
What is knock correction?
Feedback Knock Correction is a real-time timing correction the ECU makes based on a perceived noise. The ECU immediately pulls timing (the amount of the Feedback Knock Correction value) and adds timing back (value rises to 0) assuming no further noise is detected.
How do you get rid of fine knock?
- Stay out of boost.
- Get the tank low.
- Fill up with reputable fuel.
- Let the car learn back to normal.
How do I fix feedback knock?
https://www.youtube.com/watch?v=ONFLIATqHRY
How much knock is normal?
1st: small amount of knock over an hour is fine. 4th: With high ron and low compression, low knock count is ok..Dec 7, 2009
What is the difference between fine knock learn and feedback knock?
Feedback Knock Correction is a real-time timing correction the ECU makes based on a perceived noise. Fine Knock Learning represents minor learned corrections currently being applied by the ECU as a product of historical noise.