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      06-30-2020, 08:00 PM   #1
F10m513
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Drives: f10 m5
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Location: Ny

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White powder on o2 sensors ?

Installing my downpipe and noticed some white powder like stuff on My O2 what could this be ? A quick google search says cars running too lean ? I’m running stage 1 bm3
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Last edited by F10m513; 06-30-2020 at 08:07 PM..
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