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#1
12-26-2018, 10:50 PM
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E53 lean bank 1 and 2
got gas... started running rough... ses light at autoshit they got lean bank 1 and lean bank 2... think it could maybe be the gas?? idle is rough sometimes but the kicker is the brakes go soft, so Im really thinking its a vacuum issue. But dont know where to begin looking. Tried the carb cleaner check and cant get it to pop up anywhere. Im out of ideas... 
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#2
12-26-2018, 11:14 PM
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Unplug your MAF and see if it runs better, if it does then there's your answer. (New MAF)
Sent from my SM-A730F using Tapatalk Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
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#3
12-27-2018, 12:20 AM
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If no vacuum leak than lean usually means low fuel. Both banks means likely fuel delivery. The computer depends on fuel to be precise psi, it simply does math to determine how much fuel to m deliver. Low fuel pressure usually happens as the pump soft fails before it quits completely
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2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#4
12-29-2018, 07:21 PM
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Quote:
Could also be a bad Master brake Cylinder.
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