Quote:
Originally Posted by Lucky John
I am new to the X5 world so take my thoughts with a grain of salt. Sounds like you don't have good gas flow. The things I would check go like this, fuel filter (I don't even know if they have one), injectors, fuel pump, clogged fuel lines or lines that are collapsing/expanding. Then you get into fuel mapping and coding.
How many miles, has it sat for a long time? Did you put some off brand of gas in it? If you're driving don't let it ping especially going up hills-this is bad for the engine.
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I'd also check for vacuum leaks and failing O2 sensors.