Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Cobra Forums
2013-14 Shelby GT500
Fuel trims
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="merkyworks" data-source="post: 15977460" data-attributes="member: 179203"><p>This is what I understand about STFT and LTFT</p><ul> <li data-xf-list-type="ul">+ engine is lean, wants to add fuel</li> <li data-xf-list-type="ul">- engine is rich, wants to subtract fuel</li> <li data-xf-list-type="ul">Even between banks is good cause that mean all 8 cylinders are homologous</li> <li data-xf-list-type="ul">STFT is basically in the moment demand so 0 or near 0 means your tune is spot on and there aren't any engine issues like a vacuum leak.</li> <li data-xf-list-type="ul">LTFT is trend over time when in closed loop. Closed loop is all the time except right when you start up and from what I have read on some 12's and 13-14's it's even when your WOT, this value is stored in the ECU/KAM.</li> </ul><p>So 0 STFT is good and -12 to -20 LTFT means your a little rich which is a good given your higher HP output. Lambda at idle should always be hunting so your values are normal. As it was explained to me o2 sensors have ADHD and need to keep busy.</p></blockquote><p></p>
[QUOTE="merkyworks, post: 15977460, member: 179203"] This is what I understand about STFT and LTFT [LIST] [*]+ engine is lean, wants to add fuel [*]- engine is rich, wants to subtract fuel [*]Even between banks is good cause that mean all 8 cylinders are homologous [*]STFT is basically in the moment demand so 0 or near 0 means your tune is spot on and there aren't any engine issues like a vacuum leak. [*]LTFT is trend over time when in closed loop. Closed loop is all the time except right when you start up and from what I have read on some 12's and 13-14's it's even when your WOT, this value is stored in the ECU/KAM. [/LIST] So 0 STFT is good and -12 to -20 LTFT means your a little rich which is a good given your higher HP output. Lambda at idle should always be hunting so your values are normal. As it was explained to me o2 sensors have ADHD and need to keep busy. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
2013-14 Shelby GT500
Fuel trims
Top