If the Hall effect Sensor were faulty then you'd have no spark.
I'm thinking fuel .. not the right mixture.
Possibly the engine temperature sensor?
Or the fuel pump or its controller..
Could be timing...
Your easy bet is to plug it in to a bmw workshop machine as see what it says.
Last edited by Warin; 15 Jun 2018 at 05:13.
Reason: Any number of things...
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