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2010 2011 BMW 5 Series Forum F10 Rough Idle on Cold start only !!! 523i F10 2010 |
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07-20-2022, 08:38 AM | #1 |
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Rough Idle on Cold start only !!! 523i F10 2010
I have a rough idle only on a cold start. After 5-10 minutes everything is smooth, and the car runs great. Even at a stop light, when the rpm drops to 600, the engine runs perfectly, no misfires nothing.
But the first cold start of the day the car shakes can show misfire codes, mostly cylinder 1-4-2-6 sometimes a check engine light, with a drivetrain error. But when the car runs for 5 minutes. I will switch it off, and on again, the drivetrain error and check engine light are gone, and the car runs great. So I did my research and did almost all things that usually are F10 prone to break. I don't have oil in the spark plugs, so I don't think is a gasket issue. Because it shows me misfire codes. I replaced all 6 fuel injectors with index 11, 6 new bosch ignition coils, and new spark plugs, I did clean the Vanos solenoids, and I check my high-pressure fuel pump. Everything is showing good values. I will go crazy, don't know what else should I do. Please help. FR_2022-07-19_12-55-10.pdf |
07-26-2022, 07:58 AM | #2 | |
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I know i clean them with a brake cleaner. That thing hasn't improved the problem fully. Maybe i should replace them. Mine has 93 000 km Maybe its time |
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08-21-2022, 06:35 PM | #3 |
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I have a 2014 535i that does the same. It improves with high quality fuel and with new spark plugs. I’m going to change the Vanos solenoids next, as I have 80k miles on the car.
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08-21-2022, 06:39 PM | #4 | |
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Update!!!
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The situation itself improves Not sure how, but I don't mind Fingers crossed it will get only better from now on |
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