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??
08 n54 135i Alpina-AT 80k
Engine: JB4 e40/93, AFE DCI, VRSF 5" FMIC V2, VRSF Upper/Lower CP, BMS Tstat, RB PCV & BMS OCC (Next)
Exhaust: Active DP, n55 Mids (Next), Berk Ceramic Delete
Tires: Nitto 555 265/35, Nitto 555 225/40