BMW Repair Questions? Ask a Mechanic for Answers ASAP
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this points to a fuel delivery issue - based on what has been described it would most likely be due to a failing fuel pump or leaking fuel injectors. what needs to be done is a fuel pressure test where it is monitored as the issue develops..Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.