follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Delicious Tuning
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Scion FR-S Forum | Subaru BRZ Forum | Toyota 86 GT 86 Forum | AS1 Forum - FT86CLUB > Technical Topics > Software Tuning

Software Tuning Discuss all software tuning topics.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-28-2018, 05:43 PM   #1
localhost
Member
 
Join Date: Jun 2018
Drives: 2015 Raven FR-S 6MT
Location: Calgary, AB
Posts: 19
Thanks: 7
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
High negative LTFT OFT Stg1 tune

Hello folks,

Some more weird issues with my car (I had an IAM issue a few weeks ago as well). I was driving along a few days ago and I hear my OFT trigger the alarm for high LTFT. I haven't had the chance to datalog yet, but it was going below -10% (my alarm trigger point) at low throttle low-RPM scenarios. Backing off the throttle at that point seemed to make the alarm stop, but it kept happening a few times.

This was in 3rd gear about 15-20% throttle at around 3000RPM. I believe it also happened again in 4th gear, but I'm not sure. This was yesterday, and I've been having the same issue during my morning commute today as well. I'm running the OFT Stage 1 tune with 94 octane.

I will attach datalogs in a few hours after I go home. Any idea what is causing this? I don't think its an exhaust issue since my LTFT is negative and seemingly gets worse with more throttle, and not the other way around. Plus my exhaust is completely stock. Only modification on the car is the tune and a K&N drop in filter. Car has about 36k KM on it so I can't imagine very many things are worn/degraded yet.

Thanks for any help

EDIT: Datalog: https://datazap.me/u/rb28dett/ltft-1?log=0&data=1-2-9

It happened twice on my commute back and both it happened almost immediately after I backed off about 50% throttle.

Last edited by localhost; 08-28-2018 at 08:09 PM. Reason: added datalog
localhost is offline   Reply With Quote
Old 08-28-2018, 05:54 PM   #2
tomm.brz
Senior Member
 
Join Date: Jan 2017
Drives: brz 2017
Location: italy
Posts: 774
Thanks: 171
Thanked 222 Times in 179 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
scale the maf with the tool
tomm.brz is offline   Reply With Quote
Old 08-28-2018, 08:36 PM   #3
guybo
Huge E85 fan!
 
guybo's Avatar
 
Join Date: May 2016
Drives: 2016 Scion FRS
Location: Tampa, FL, USA
Posts: 1,856
Thanks: 539
Thanked 1,001 Times in 602 Posts
Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
The STFT were compensating and your total trims were on point. I think it was just the heat. Increase your trigger point

Quote:
Only modification on the car is the tune and a K&N drop in filter
You don't even have to monitor any of this, you're just panicking yourself over nothing. You haven't done any hardware mods, turn it all off and just drive.
guybo is offline   Reply With Quote
The Following User Says Thank You to guybo For This Useful Post:
localhost (08-29-2018)
Old 08-29-2018, 02:22 PM   #4
localhost
Member
 
Join Date: Jun 2018
Drives: 2015 Raven FR-S 6MT
Location: Calgary, AB
Posts: 19
Thanks: 7
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by guybo View Post
The STFT were compensating and your total trims were on point. I think it was just the heat. Increase your trigger point

You don't even have to monitor any of this, you're just panicking yourself over nothing. You haven't done any hardware mods, turn it all off and just drive.
I completely forgot to check the total fuel trims... That makes perfect sense now.

You're absolutely right though - I need to leave the OFT at home and just drive...
localhost is offline   Reply With Quote
 
Reply

Tags
high ltftf, ltft, oft, tune

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
High negative STFT and LTFT 86TOYO2k17 Issues | Warranty | Recalls / TSB 14 07-11-2019 05:50 PM
LTFT high/low? Sel_brz17 Software Tuning 3 05-08-2018 06:48 PM
Super High LTFT +36.77% at idle? (E85 with OFT tune) D4FD Software Tuning 11 09-05-2017 02:24 PM
High Negative LTFT on N/A BRZ causing idling issues paintdude258 Software Tuning 57 03-26-2017 08:14 AM
LTFT High, Stock Tune and Stage 1 93 Bushhy Software Tuning 0 03-11-2017 02:34 PM


All times are GMT -4. The time now is 12:21 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.