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 Rough engine at idle and low rpm, bad injectors?
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      02-07-2020, 02:23 AM   #1

Drives: 2012 BMW 550i M-Sport
Join Date: Sep 2015
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Rough engine at idle and low rpm, bad injectors?

I had my N63 replaced in my f10 less than 10k miles ago, but they used pretty much everything besides the spark plugs from the old engine. 95k miles. when idling, it seems like there's an occasional bad fire, not bad enough for the cel to go on, and also when accelerating, it seems like the power isn't consistent. Its the worst when accelerating when the engine is cold around 1k rpms.

If its a bad injector, is there a way I can test them to see which one it is?

Dirty fuel filter maybe?

Any suggestions?
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      02-07-2020, 10:00 AM   #2
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Drives: 2015 BMW 535xi
Join Date: Apr 2019
Location: New Jersey

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Could also be O2 sensors.
2015 BMW 535xi

Bootmod3 Stage 2 | ER Catted DP | Remus Exhaust | Gplus FMIC
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