Welcome to the North American Subaru Impreza Owners Club Friday January 17, 2020
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > AccessPort

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.

* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 12-05-2019, 11:57 PM   #1
Scooby Newbie
Member#: 159723
Join Date: Sep 2007
Chapter/Region: MWSOC
Location: Michigan, USA
2016 Forester XT
Crystal White Pearl

Default 2016 FXT lots of knock part throttle

I am noticing a lot of knock events on my FXT on an OTS Stage 1 tune. Is this DAM dancing around and the feedback and fine learning knock I'm seeing enough to cause concern? I use Costco 93 octane gas, maybe I should try Shell and see if it clears up? Maybe go to the 91 octane map? Or just ignore it becuase it's fine at WOT? Any insight would be appreciated!

K&N drop in panel filter
Go Fast Bits BOV (stock plastic one was leaky)
Removed the resonator from the airbox because I like turbo noises :|

* Registered users of the site do not see these ads.
OHTOORECKS is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-08-2019, 06:50 AM   #2
Scooby Newbie
Member#: 509118
Join Date: Dec 2019
Default Get A Protune

So first off, if you see your DAM changing, immediately stay out of boost. Feedback knock isn't as important but since your DAM is changing then it could be a real problem. Stage 1 for FXT your year is stock intake and filter so if you've changed either of them in any way then you shouldn't run the map. Running 93 while a tune requires 91 will not negatively effect your car, running a lower octane would. My suggestion is to get a protune.
Hostil.Hatch is offline   Reply With Quote
Old 12-09-2019, 07:16 PM   #3
Scooby Specialist
Member#: 257231
Join Date: Sep 2010
Chapter/Region: Tri-State
Location: Hudson Valley, NY
2011 STI ShinjiTuned


I see knock mainly at low boost and cruising. This is probably why the DAM is dropping, so it doesn't look too bad. However, because you made a few changes to your intake side, the fuel trims are now adding a bit more fuel, so trims are a bit high.

I'd recommend getting a custom tune to work out the little kinks.
ShinjiML is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 09:45 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2020 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.