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Old 03-24-2011
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short term fuel trim questions????

i have a 98 ranger 3.0 5 speed 4x4. i do the live data on it and its shows every thing is good except for the stft (short term fuel trim) on bank 2 sensor 2 stays at a -100 and does not fluctuate while driving. i think this is part of the reason i am only getting 14 miles to the gallon. i think it is the downstream o2 sensor but not sure looking for some info or advice on what you guys think
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Old 03-24-2011
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Originally Posted by bschnacker View Post
i have a 98 ranger 3.0 5 speed 4x4. i do the live data on it and its shows every thing is good except for the stft (short term fuel trim) on bank 2 sensor 2 stays at a -100 and does not fluctuate while driving. i think this is part of the reason i am only getting 14 miles to the gallon. i think it is the downstream o2 sensor but not sure looking for some info or advice on what you guys think
There is no bank 2 sensor 2 on your truck; that's why the scanner says that the STFT is always way out in the weeds.
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Old 03-24-2011
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I'm sure 14 mpg was the best my truck ever was new lol. That seems pretty normal
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Old 03-24-2011
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Originally Posted by rwenzing View Post
There is no bank 2 sensor 2 on your truck; that's why the scanner says that the STFT is always way out in the weeds.


well that explains why i cannot figure out how to fix it. thank you guys for all the information.
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