hey everyone. 08 335. 62k km. hpfp replaced before I owned the car. plugs changed at 45k km. feeling same problems. one new issue is in the morning on a cold start when the rpm bumps up and settles it almost feels like its going to stall as it dropa below 500 rpm. also. how do I know that I am misfiring? im not throwing any codes. thanks!
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