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2010 2011 BMW 5 Series Forum F10 535i xDrive 2012 weird puff noises cold start |
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12-28-2017, 10:19 PM | #1 |
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535i xDrive 2012 weird puff noises cold start
Dear members,
I have been fighting with the problem of my car "puffing" on cold starts for about a year now. After changing the injectors 2 times by my BMW Dealer, the problem went away for just a couple of months, just to come back. Video of the problem: Could anyone please tell me why my car is acting like this? My dealer says there's nothing wrong with the car, but I think the opposite, because it already shut down on its own once when I was driving (low speeds of 5-10km/h). Thanks in advance. |
12-31-2017, 10:07 AM | #3 |
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12-31-2017, 01:23 PM | #4 |
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Have you ever had Coolant Low message or had to add Coolant during the year of you fighting this issue? Have you ever had an excessive White Smoke out of a Exhaust? If you did, you have a coolant leak into exhaust chamber.
Other potential symptoms is what others have mentioned, condensation. Does it mostly happen at cold temperatures? Do you drive short miles and not getting engine to desired temperatures to burn all of the condensation?
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2013, 535 XDrive, 112k miles
1997, 328is, 335k miles - Retired 1998, ML320, 200k miles - Sold 2018, Q5, 100 miles 2005, XC70 AWD, 160k miles |
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01-01-2018, 03:34 PM | #6 | |
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If so, how can it be fixed?
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Never had a problem with the coolant as far as I know, also the white smoke you mentioned; not that I know. How can condensation cause the sound as if there are misfirings in the cylinders? Where is the condensation? In the exhaust? In the cylinders itself? |
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01-01-2018, 05:50 PM | #7 | |
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Does this help?? |
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01-02-2018, 09:44 AM | #8 | |
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01-02-2018, 10:50 AM | #9 | |
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I have an M Performance exhaust. Although generally only on the car in nicer weather (the last couple of years I've been taking off the PE when I put on my snow tires) it really accentuates any kind of irregular idle or misfire. With the PE even warmed up you can hear this kind of thing at idle but pretty slight. All this doesn't mean I'm not suffering from misfires too. So far the dealer has ignored it since it's hard for them to duplicate the problem, unless they hang on to my car overnight. I've reported the issues in writing several times throughout the factory and factory-extended warranty periods. I've also read several posts and articles from F10 forums saying 'all modern cars are jerky on cold start' and attributes to direct injection, Valvetronic technology etc... When you think about the technical complications of both, it's almost a miracle these engines start and idle at all in less than ideal conditions. |
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