2010 2011 BMW 5 Series Forum F10
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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications maybe vacuum leak
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      04-21-2024, 12:09 AM   #1
jdelpup
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2013 BMW 535ix  [8.00]
maybe vacuum leak

2013 535i downpipe, stg2+, charge pipe, fmic

had a bad o2 sensor then got it fixed. it was running good. cel came on and i got similar symptoms to the bad o2 sensor. no stalling but whenever i brake and come to a stop the car rumbles and sounds like it is about to stall but it doesnít. if iím parked it will occasionally rumble (i think misfire) but it doesnít stall. driving is fine everything is just when rpmís are low. the codes i attached are the ones i got when i ran them initially. i checked my maf and vacuum lines and cleared the codes. they went away but came back shortly later this time just with a fuel mixture too lean code. cel is on now and it is just lean code when i scan it. any ideas?
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      04-21-2024, 01:09 PM   #2
95blkmax
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I suggest a smoke test as a starting point.
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      04-21-2024, 03:32 PM   #3
poverty.f10
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How much rpms is it dipping?
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      04-21-2024, 03:38 PM   #4
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it drops to around 500 probably when i brake and it rumbles and misfires for a second but then goes back to normal idle
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