follow ft86club on our blog, twitter or facebook.
Delicious Tuning
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > 1st Gens: Scion FR-S / Toyota 86 / Subaru BRZ > Scion FR-S / Toyota 86 GT86 General Forum

Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86

User Tag List

Thread Tools Search this Thread
Old 08-25-2021, 11:26 PM   #1
Collin Long
Junior Member
Collin Long's Avatar
Join Date: Aug 2021
Drives: 2013 Scion FRS
Location: Kentucky
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Bad LTFT, STFT, and Knock due to K&N Intake?

Hello i have a 2013 scion fr-s and i have a k&n intake with tomei EL headers and a invidia catback exhaust, i have stage 2 plus on the car and was wondering if these data maps are correct for my car, it seems like my STFT is a little high and I have some knock correction and my flkc sometimes goes up under 1 degree, i can't tell if i have any exhaust leaks i have tightened everything but I still hear something when my car starts and when i give it low throttle but once I've been driving a bit i stop hearing it, i know the k&n filter isn't meant for the off the shelf tunes that OFT gives you but I was wondering if anyone else has the correct MAF sensor scaling for the K&N typhoon intake. Also check out my data zap.

UPDATE: I am now using Stage 2 Plus E85 with the same setup and no noticeable exhaust leaks but still no MAF sensor scaling corrections, I am still getting knock correction and flkc but not that much. My Idle LTFT is about -14 and it goes up and down but stays around there, My STFT sits around 0.75, when I drive it usually stays around -3 and went to -7 sometimes only. Im pretty sure this isn't normal so I was wondering If it could be an exhaust leak or I need to fix the MAF sensor for the K&N Intake?

UPDATE 2: This is just regular road driving and highways, no WOT or hard acceleration.

UPDATE 3: 2 3rd gear pulls and noticed some knock right when i went full throttle around 3k rpms and ltft's and stft's seem off still and AFR seems to change more than i would like, let me know if this data looks alright.

UPDATE 4: Back on Stage 2 Plus with 93 and got some more data logs, I don't know if I'm running rich or lean but I can see that something needs changing.

Steady driving:
Regular driving:
3rd gear Pull:

UPDATE 5: I ended up putting the stock airbox back in to see if it runs better because I'm not trying to mess with any MAF scaling and I'm not good at it. I'm pretty sure that's the problem because I had my engine replaced about 3k miles ago and nothing should be wrong, no exhaust or intake leaks that I'm aware of either, if you could please still let me know what was causing my knock and bad fuel trims. Thank you!

Last edited by Collin Long; 09-07-2021 at 12:36 PM.
Collin Long is offline   Reply With Quote

intake, leak, maf, oft, scaling

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Here's My Data Log(s) czellers Engine, Exhaust, Transmission 5 04-02-2021 09:17 PM
IAT OEM PID/CAN Data - RC MK2 M0nk3y Tracking / Autocross / HPDE / Drifting 7 07-20-2020 01:47 AM
I'm Looking for a good school for auto mechanic and good places? kiname Southern California 2 07-02-2014 04:10 AM
Found a good place with good price for ceramic coating for headers CamryDS Northern California 0 03-28-2014 05:03 PM
OFT Data log.. Are these okay HSayaovong Software Tuning 2 03-25-2014 06:56 PM

All times are GMT -4. The time now is 03:53 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.