It seems to be a fuel pump issue from what I read should I take off the jb4 before giving it to the dealer or does it not really matter and just turn back to stock tune??
11' 335d 74k Miles - K&N Drop In
08' n54 135i Alpina-AT 107k Miles - SOLD
Engine: JB4 e40/93, AFE DCI, VRSF 5" FMIC V2, VRSF Upper/Lower CP, BMS Tstat Bypass
Exhaust: Active DP, Berk Ceramic Delete