Electric Vehicle Forums - Long Term Fuel Trim

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Organica1

07-21-2015 12:33 PM

Long Term Fuel Trim

Anyone know what normal LTFT are?

Thanks.

wptski

07-24-2015 05:15 AM

Re: Long Term Fuel Trim

Quote:

Originally Posted by Organica1 (Post 257216)

Anyone know what normal LTFT are?

Thanks.

Actually you need to add the STFT and LTFT together. The total shouldn't exceed 10%. They could be -/+ and adding could equal zero which would be perfect.

gpsman1

01-12-2016 12:48 AM

Re: Long Term Fuel Trim

Quote:

Originally Posted by Organica1 (Post 257216)

Anyone know what normal LTFT are?

Thanks.

Should be 0 with plain gas in normal condtions at sea level. The number should go negative at higher altitudes and go positive with ethanol use.

Should be about 3.5 with 10% ethanol in the gas.

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