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Old 01-08-2010, 07:18 PM   #8 (permalink)
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Join Date: Jul 2009
Location: New York
Posts: 510

no nickname , it's just a car - '04 volkswagen golf tdi
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fuel trim
short term fuel trim
long term fuel trim

LTFT is adjusted to keep STFT bouncing or cycling on zero
equal amounts up and down

if LTFT gets past a certain value , the system codes for rich or lean condition depending

if MR MAF sensor reports incorrectly LTFT adjusts to keep system at stoich to the limit described above

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