About LTFTB1 . HELP

[Dairm]

Hello everyone,

I just recently tuned my car and am getting what, to my understanding, are weird or even potentially bad fuel trim readings and was hoping someone here who knows more than me could tell me if I should be worried or not and What can I do about it



Info about the car:

1.5T L15b8



base map 2



PRL Stage 1 intake hose (not using a PRL filter though)



Relevant readings (tell me if I should add more here):



LTFTB1: -14% to -15%

Knck ctrl: 0.49 to 0.59

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[domicubarican]

flash it back to stock and see if fuel trims correct themselves, if they do then it is the tune itself. If not, check for any vacuum leaks around intake.

 

[Dairm]

flash it back to stock and see if fuel trims correct themselves, if they do then it is the tune itself. If not, check for any vacuum leaks around intake.

OK, I'll try. Thank you

 

[KTuner]

The MAF curve is not altered in our tunes, so you should essentially have the same fuel trims on the factory tune. Those do seem higher than what most see on this platform, but it could be a mix of your engine, fuel, and weather especially if you let it idle a lot in stop and go traffic etc.

 

[Dairm]

The MAF curve is not altered in our tunes, so you should essentially have the same fuel trims on the factory tune. Those do seem higher than what most see on this platform, but it could be a mix of your engine, fuel, and weather especially if you let it idle a lot in stop and go traffic etc.

I see. Thank you for your answer

 

[Dairm]

The MAF curve is not altered in our tunes, so you should essentially have the same fuel trims on the factory tune. Those do seem higher than what most see on this platform, but it could be a mix of your engine, fuel, and weather especially if you let it idle a lot in stop and go traffic etc.

It's been a long time, I replaced a BMC air filter element, which is still hovering at -12. What should I do to restore the normal value?

 

[gtman]

Basically it's what KTuner said. You're essentially running the stock intake. Could be something as simple as you driving a lot in traffic with much idling.

 

[Dairm]

Basically it's what KTuner said. You're essentially running the stock intake. Could be something as simple as you driving a lot in traffic with much idling.

Well, I don't have to worry too much about this

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