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stft ltft goals

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stft ltft goals

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Sep 20, 2015 | 10:41 AM

#1

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stft ltft goals

I just took a ride in my car and logged my fuel trims, and I was wondering, what should my goals be for fuel trims?

I let them engine warm up, I then reset my fuel trims with the hp tuners scanner. I logged them in sd mode with dfco, and cot disabled. my histogram for ltft is mostly +3 to +5

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Sep 20, 2015 | 11:17 AM

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stft ltft goals

You should shoot for 0 to -3.

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Sep 20, 2015 | 11:50 AM

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Quote:

Originally Posted by red_00z28

You should shoot for 0 to -3.

0 to -3 for ltft or stft or both

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Sep 20, 2015 | 12:52 PM

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LTFT. If it were both you could be up to 6% out. Less than 3% is good but 5%is acceptable.

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Sep 20, 2015 | 02:04 PM

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Understand how they work. LTFTs adjust to keep the STFTs close to 0

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Sep 20, 2015 | 04:38 PM

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Long term yes. In the short term you can have both reading +/-3%. Eventually you'll end up at +/-6% on the ltft but it's still best to keep the total under 3% combined.

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