08-18-2023, 10:54 PM | #1 |
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Rough Idle after Starting
2009 E70 30i
Rough Idle with erratic Fluctuating RPM after Starting for about 20 seconds Seems worse when starting first thing in the morning. Still there after starting when warm RPM seems to also fluctuate when stopped at traffic lights Seems to accelerate OK under light or heavy acceleration Any suggestions on what it may be Thanks in Advance |
08-19-2023, 10:56 AM | #2 |
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Drives: 2006 M5, 2012 X5d, 2008 E91
Join Date: Aug 2012
Location: Seattle
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Could be a lot of things. Do you have a check engine light? I'd get a good code reader and see what it says.
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09-09-2023, 01:25 AM | #3 |
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it is a
P00BD Mass Air Flow (MAF) Sensor A - Circuit range/performance The mechanic had a look and it is an air leak from the Air Box to the Intake Manifold, he tightened the clamp, which fixed it for a while, now doing it again so still needs to further look at it |
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rough, rough cold start, rough idle |
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