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ltft on os12 appears to be locked at 99.22%

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7 years 10 months ago #24247 by RonHum
ltft on os12 appears to be locked at 99.22% was created by RonHum
HELP!!!!! While scanning my 2002 Ford F150 5.4L Bi-fuel system I noticed that LTFT on Bank 1 appears to be locked at 99.22%. It never varies during acceleration or decel. I do not know what to do to find out what is wrong. Any ideas as to what is wrong and/or how to fix the problem.
Thanks in advance!

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7 years 10 months ago #24248 by Ben
Replied by Ben on topic Re:ltft on os12 appears to be locked at 99.22%
I'm sure that's s2 that your looking at. it's not used 99.xx is a generic number for no value I'm not sure why they did that instead of using 0 ..... anyways just ignore it real fuel trims don't read decimal and usually top out around +-30

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7 years 10 months ago #24250 by Tyler
Replied by Tyler on topic Re:ltft on os12 appears to be locked at 99.22%
Ben is correct in his suspicions - you're probably looking at STFT B1S2%. There's likely another PID for B1S1 that says the same thing. Feel free to ignore them. ;) They have no influence on fuel control, and aren't an indication of anything.
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