My BMW 1 Series has been experiencing a rough idle at startup and when stopped at traffic lights. It seems to be worse in cold weather. What could be causing this issue?
ReplyOne possible cause of this rough idle could be a faulty idle air control valve. This controls the amount of air entering the engine at idle, and if it is not working properly, it can cause a rough idle. It is recommended to have it checked and possibly replaced by a certified mechanic.
Another common cause of rough idle in BMW 1 Series is a dirty or clogged fuel injector. This can disrupt the fuel spray pattern and cause the engine to run rough. It is advisable to have the injectors professionally cleaned or replaced if necessary.
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