Quote:
Originally Posted by BMW's Only
Hi everyone,
So I've been bringing my car in to two different dealerships for rough idling on cold start and after the engine is warm. The dealerships have both told me that the rough idling is within spec and that it is similar to other 328i's. I have taken it in about 5-6times for this issue already. 49,6xxmiles on the car. Please let me know what your thoughts are on this.
Thanks!
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I had the same problem. Fixed it by pouring Chevron Techron fuel injector cleaner in the gas tank. My theory is that the e90 does not have a user friendly way of replacing the fuel filter (it is integrated with the fuel pump and costs over $240 to replace) therefore dirty fuel is fouling up the injectors. Good luck and post an update.