Originally Posted by Da _Grk_Tuner
hey guys I have replaced my fuel pump 2 times before hitting 25,000 miles also I had BMW change my spark plugs right before my warranty expired at 45,000 miles I also recently got walnut blasting on my car done by Helix at 46,000 miles and still sometimes when I'm at a red light I get a quick small shake and I see the rpm gauge moving a bit and then stops right away I get this once in a while even with the hpfp replaced twiced. changed spark plugs according to BMW and. walnut shell blast
any idea guys?
Software. My car used to do that when new. My dealer changed the plugs/injectors/and spark plugs - and updated the SW when my car was brand new. I never had that problem again. I actually kind of miss it though.
Then later when I got BMW anti-tuner SW update for the HPFP recall... that killed my throttle response and gave me that "lag SW" update.
Personally I would just live with this - its really not causing any harm. BUT if it really bothers you - you could have bmw do a SW update and take your chances with the "lag SW".