The engine stutters when cold below 0 degrees

Hello everybody! I own a 2005 BMW E90 320d automatic with M47 204d4 M47 engine and I am experiencing a strange problem. Only when the temperature is below 0 degrees, the engine stutters for about 3 seconds after which it returns to normal. I replaced the injectors with new OEM BMW OEM ones, OEM relay and spark plugs, OEM relay cable, OEM fuel filter, checked engine compression, changed oil, filters and accessory belts, thermostats and antifreeze, coolant sensor and checked the alternator. I mention that the problem only occurs when cold, after an 8-9 hour idle, and only below 0 degrees. From 5 degrees up, the engine runs normal. Any idea what could be causing this problem? Thanks in advance!

(Translated from Romanian)

1 comment(s)

Check the glow plugs and the glow plug control module. Cold weather starting issues can often be related to these components, especially if the problem occurs only at low temperatures. Ensure they are functioning properly, as they are crucial for starting diesel engines in cold conditions. Let me know if this resolves the issue or if you need further assistance.

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