Hi all, I own a bmw f20 116i 2013, it is currently running a stage 1 remap with MST air intake and res and backbox delete. The car drives absolutely fine however if I’m in 2nd gear and put my foot down between 3500-4500 rpm I can feel the whole car shake, it does not do this in any other gear and can rev out perfectly fine. Any suggestions would be appreciated, I have replaced all ignition coils and spark plug less than 500 miles ago


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