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Thread: LTFT vs LT Adaptation of mixture formation

  1. #1
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    Question LTFT vs LT Adaptation of mixture formation

    Hi
    I had my 2015 VW Tiguan 1.4 TSI (45,000 km) checked two days ago at a VAG garage for bad fuel consumption (some 25% higher than normal) with no CEL.
    They said the car is fine and gave me 2 screenshots that I will attach below.

    My first question is: Although I know very well what LTFT stands for and what it does, I have never heard of LT Adaptation of mixture formation. Can you tell me what is that all about?

    My second question is: At idle, as you can see, LT Adaptation of mixture formation is -10.2% but when engine gets revved, LT Adaptation of mixture formation goes to -2.3%. How should I interpret that and is my car running OK? There is no misfire, no hesitation, no bad start, just random slight trembling at idle.



    Last edited by FlorinGeorgescu; 04-04-2020 at 09:51 PM.

  2. #2
    Benevolent Dictator Uwe's Avatar
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    "Mixture Adaptation" is German Terminology translated back to English. It means Fuel Trim.

    Please see:
    http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info

    And please post an Auto-Scan

    -Uwe-
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  3. #3
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    Quote Originally Posted by Uwe View Post
    "Mixture Adaptation" is German Terminology translated back to English. It means Fuel Trim.
    Hi Uwe. Got it. Yet it's not clear why there is LTFT at idle and also LTFT as two separate measurements (IDs) with different values at idle...

    Code:
    Removed.   Data from a clone/pirate copy of VCDS is not acceptable here.
    Last edited by Uwe; 04-05-2020 at 10:21 AM.

  4. #4
    Benevolent Dictator Uwe's Avatar
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    Sorry, but getting help in this forum requires the use of a legitimate VCDS system.

    They are available directly from us:
    https://store.ross-tech.com/shop/cat/VCDS

    ... Or from any of our authorized resellers:
    http://www.ross-tech.com/distributors.php

    Let us know if/when you get one and we'll adjust your forum status.

    -Uwe-
    Lock-down of sick people: Quarantine
    Lock-down of healthy people: Tyranny

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