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Ron, ASE Certified Technician
Category: BMW
Satisfied Customers: 35851
Experience:  34 years Fixing Cars and Trucks
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My mini will idle fine then I drive it and all of a sudden

Customer Question

My mini will idle fine then I drive it and all of a sudden it slows down to a crawl. I will have it floored in first gear and I'm going 20mph. I changed the fuel filter but I'm here so that did not work. Help
Submitted: 2 years ago.
Category: BMW
Expert:  Ron replied 2 years ago.

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

The problem you are describing may caused by sludge build up in the throttle body, try disconnecting the negative battery cable and take some carb cleaner and a soft cloth and give the throttle body a good cleaning, after doing so, reconnect the cable and start the engine and let it idle for 15 to 20 minutes so the computer can relearn the closed throttle values. Give this a try and let me know if it resolves the problem for you.