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mrderekmeier mrderekmeier is offline
Junior Member
Posts: 52
Join Date: Jul 2015
Car: 2012 BMW 535i M Sport 6spd
Default 06-18-2019, 01:36 PM

Originally Posted by Ocean
This sounds like it is the EKP fuel module. I experienced identical issues some years ago and wrote a lengthy post about it. I replaced it and set it on a small heat sink. No issue since.
Basically the Walbro has a higher amp draw which generates excessive heat. Causes the signal from the EKP to be compromised, ECU then shuts off both pumps and ignition. Once the EKP module cools off after 5-10 min car starts and drives again. Until heat builds up, repeat cycle.
Its located in trunk near gas filler. Peal side cloth aside and you see it mounted on inside. It has a metal plate for heat sink. Mount the new one on a heat sink with fins. I used a 4x4" aluminum heat sink. Have had zero issues since.
No issues with the OEM pump installed. Logs look good too, seems that the factory pump is supplying enough fuel for my setup on PS2 + PI on E40. I didn't even need an upgraded pump. Of course I have boost turned down in upper RPMs because it tapers and I don't want to run at 100% WGDC.
Attached Files
File Type: csv 2019-06-13 09_21_39_Map-6.csv (10.9 KB, 45 views)
File Type: csv 2019-06-13 09_27_56_Map-6.csv (11.4 KB, 45 views)

2012 F10 535i 6MT:
Pure Stage 2 Turbo, GFB DV+, MHD JB4 BEF, Phoenix Racing PI Intake Manifold with 550cc injectors & BMS Controller, Walbro 450 LPFP, VRSF D*, CP, G-Plus FMIC, M5 Mufflers, 550i Clutch, E85 Blend (E40)
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