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BMW M5 F90 (2018+) General Forums F90 M5 General Forum    lumpy idle - intermittent

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      04-30-2022, 08:25 PM   #45
BobsM3Coupe
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Originally Posted by m5eattle View Post
I've always let it warm up and settle in revs before driving it. Takes a minute or two at most. I've read that this ensures oil is properly circulated, prevents bore scoring etc.
On a cold start, or even when it's warmed up, my 2021 X5MC takes about 20 seconds to drop from the higher idle down to its normal 600-700 rpm idle. I always wait the 20 seconds.
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      08-18-2023, 11:54 AM   #46
Rickala
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Quote:
Originally Posted by BobsM3Coupe View Post
On a cold start, or even when it's warmed up, my 2021 X5MC takes about 20 seconds to drop from the higher idle down to its normal 600-700 rpm idle. I always wait the 20 seconds.
I think it's important to realize that the competition model has solid engine mounts and they don't give so any kind of misfire no matter how slight will shake the car
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