My 2003 BMW 525 sedan with 63,000 miles cranks on ignition but then stalls repeatedly, and sometimes refuses to “catch” at all, when the temperatures drop into the low 20s or below. If the engine does “catch” and then run, it will then be fine and not stall again while warm. The colder it is outside, the worse the problem at startup. In warmer temperatures, the car starts and runs without any stalling. The plugs and coils have been replaced. A recent attempt to read error codes by an independent shop did not reveal any useful information. Any ideas?
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