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BMW 3-Series (E90 E92) Forum
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335d rough idle and very smokey
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| 09-23-2019, 11:53 PM | #1 |
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335d rough idle and very smokey
Hi. I have a 335d which is running very rough. Like a misfire but it's not. Checked all vacuum lines which are ok. MAP sensor ok as well. The throttle body seems to constantly move and twitch. When I unplug the MAFF sensor it stops twitching and settles down. Could MAFF sensor be faulty causing rough idle and smoke from exhaust?
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