10-30-2019, 03:33 PM | #1 |
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Rough Idle and Vibration
Hello, I recently picked up a 17 540i M sport. It seems to have a rough idle and vibration at start up and when engine temp is cold and I was wondering if this is normal? Almost resembles a bad engine mount. There’s also a slight vibration when cold. Dealer had installed new front tires before I purchased. Thanks,
Dave |
05-05-2020, 07:06 AM | #2 |
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Drives: 540i MSport
Join Date: Jul 2019
Location: Atlanta
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I can't say with absolute certainty, but it sounds very much like it's missing on one of more cylinders. Probably a bad spark plug. Are you getting a CEL?
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08-16-2020, 07:05 AM | #3 |
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I had such issue like this with my 18 530i
took it to dealer and they manage to fix that issue now the vibration is very minimal if not gone. btw it wasn't something rough but its noticeable |
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01-06-2023, 09:36 AM | #4 |
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Drives: G30
Join Date: Sep 2022
Location: San Francisco, CA
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In my case i have no CEL, but the same experience otherwise. Rough idle at cold start. Also been noticing an odd vibration at very low speeds, like 5 mph/8km. It takes about 2 mins before the roughness stops at startup. Any thoughts appreciated.
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01-07-2023, 06:01 PM | #5 |
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Try running some fuel injector cleaner through it. That helped my idle issue when I got my car.
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'19 X3 M40 Carbon Black/Oyster, '23 Jeep Grand Cherokee L Summit, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS |
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01-08-2023, 11:57 AM | #6 | |
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Quote:
If you do try fuel injector cleaner I’ve been hearing great things about this company and their line of products. My car runs great but I’m close to 85k miles, so I may run some of their products at my next oil change. https://www.hotshotsecret.com/gasoline-extreme-12-oz/ |
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