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Bank1 unstable fuel trim

Originally Posted by ihaveashihtzu How rich are you running at idle? You may need to re tune. What do your AFRs look like when you do a pull to redline?

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Old 12-06-2022, 07:37 AM   #1 (permalink)
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Originally Posted by ihaveashihtzu View Post
How rich are you running at idle? You may need to re tune.

What do your AFRs look like when you do a pull to redline? The ECU will go into open-loop mode which ignores the short term fuel trims (they should read 100% during this time).
Have a tune session planned but can't tune until I have this resolved.

my bank 2 will sit at 97, but my bank 1 will jump between 100 and 125.

at idle my AFR for bank 2 is around 14.7 and my bank 1 will jump around from 12s-16s.
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Old 12-06-2022, 12:00 PM   #2 (permalink)
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Have a tune session planned but can't tune until I have this resolved.

my bank 2 will sit at 97, but my bank 1 will jump between 100 and 125.

at idle my AFR for bank 2 is around 14.7 and my bank 1 will jump around from 12s-16s.
Could you post a log file?
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