The engine goes out right after starting – what is the cause and how to fix it?

BMW driver question

In my BMW there is such an unpleasant symptom when firing up after a long stop, usually after a night. I get into the car in the morning and start it. The engine immediately goes out and so I have to 3, 4 times before it finally catches on. Sometimes if it doesn’t fire up the first, top of the second time, it helps to fire it up with the accelerator pedal pressed halfway, although I know that it is not advisable to fire it up that way.

Once it fires up, it then fires up every time. I don’t know if it’s the fault of a weak pressure or some sensor, which is why I’m writing to BMW specialists. On various forums, unfortunately, no one has been able to help me.

Still, just out of curiosity, I would like to know what rpm my engine should have at idle after warming up? According to me, mine has a little too low revs at about 500-600rpm.

The problem was with a 2003 BMW 325i with a 192 hp 2.5L engine with an automatic transmission, but it also occurs in other models.

BM Cars service response

Difficulty starting the engine after a long stop is very often caused by a malfunctioning crankshaft position sensor. If there are no problems firing up the engine warm, the sensor is most often the cause. For a correct diagnosis, a full engine diagnosis is necessary.

As for the idle speed of the engine, it depends on the temperature of the engine and the load of the engine by external accessories (alternator, air conditioning compressor, etc.). They usually oscillate around 750 rpm. The magnitude of these revolutions and the behavior of the engine after startup can also be diagnosed in our service.

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