Originally Posted by crypticc
Thanks for replying.
I was going to do that mate, but thought I'd give stock a go because they've only done 24k untuned miles. cannot say for sure but the pull logs coincide with slightly course feeling around 3k on a partial throttle. That started couple of years ago about when I left car with BMW for a week to sort waste gates. Wonder if they dabbled?
thought I'd leave stock for a bit then pop into garage.
Since it moves around i'd guess plugs. With just 24K I assume you're still under warranty and since the misfire occurs when "stock" i'd suggest taking it to the dealer and let them handle it.