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Mandro Mandro is offline
Posts: 4
Join Date: Dec 2019
Car: BMW 135i
Default 135i HPFP on its way out? - 01-28-2020, 12:02 AM

Hi guys, I hope you are all well!

Unfortunately I've been having some issues with the car recently and before I go and spend a bunch of cash with FCP Euro, I wanted your expert opinions and advice please.

Last week Friday im on my way to my office to go and install my new 3.5 bar Tmap sensor and Spool Performance Flex Fuel Ethanol analyzer. Five miles out from the office the car suddenly jerks and throws a CEL . I read the code via my JB4 and it gives me "29DC Cylinder Injection switch-off".

I clear the codes, take it slowly into the office and start the upgrades. Then on the way home, I had to pull over about 3 times to clear the same code in order to limp home. Saturday morning I decide to update the JB4 firmware, then replaced the 'RACE' back-end flash with the 'PUMP' version and added 20 liters of 95 fuel so the car went from E27 to E8.

Ran the car a few times WOT and it was happy (see log attached pumpBEF-good.csv). Then I took the car out on Sunday for further testing and every time I tried to go full throttle it bogged hard and gave an error. The third time it through the CEL it died completely and I had to tow the car home.

Attached are the three logs I could pull from Sunday (XLS files) and I have highlighted the HPFP, LPFP, THROTTLE, PEDAL and RPM columns. Before I convince myself that the HPFP needs replacing please can I have your input?

*Please note I replaced the stock LPFP a few weeks ago

Mods on the car are as follows:
MMP Silicone inlets - 2 weeks old
Spool performance stage 2 bucketless LPFP - 2 months old
Spool performance flex fuel kit with upgraded fuel line - 1 week old
BMS 3.5 bar Tmap sensor with wiring harness
Dual Cone intakes
VRSF down-*****
Charge pipe with TIAL BOV
7.5 inch Race intercooler
Hybrid turbos
BMS JB4 with backend flash
BMS water meth kit
xHP stage 3 transmission flash
Attached Files
File Type: csv 2020-01-25 map6-pumpBEF-good.csv (18.9 KB, 45 views)
File Type: xls 2020-01-26 07_46_48_Map-6.xls (44.0 KB, 48 views)
File Type: xls 2020-01-26 07_48_20_Map-6.xls (48.0 KB, 49 views)
File Type: xls 2020-01-26 07_54_57_Map-6.xls (44.0 KB, 47 views)
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Rushan's Avatar
Rushan Rushan is offline
Posts: 1,238
Join Date: May 2014
Car: 335i E92 2009
Default 01-28-2020, 04:59 AM

not sure if this will help lower your ff as its almost 148, also lower your FOL from 90 maybe to 40 and see if fuel pressure still drops as start.

09 E92 335i - Hot-Climate Middle East package, M Sports suspension, 19" Rims, 6AT fully built internals, bushings, raybestos clutches and sonnax with xHP stage 3, Differential lockdown, New RB Turbo CHRA, JB4 - Map 3 70 adder with N20 TMAP - MHD BMS Race Flash with Tuned Duty Bais and PID - BMS Oil Cooler Valve - RB PCV - K&N DCI - AFE Air Scoops - 98 Super Fuel - WAGNER FMIC - 3" down's, RB Inlets- BMS charge pipe With Tial BOV - BMS Meth Kit with FSB, 30/70 Water/Meth on CM12 nozzle
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Posts: 8,484
Join Date: Apr 2014
Car: E92 335XI
Default 01-28-2020, 10:20 AM

To be honest it could be a few things..

Your HPFP & your LPFP don’t look very solid

Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

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Mandro's Avatar
Mandro Mandro is offline
Posts: 4
Join Date: Dec 2019
Car: BMW 135i
Default 01-28-2020, 11:46 PM

I got to the LPFP last night and noticed this (see attached) and I am wondering if this is not a 'fuel-starvation' issue now - I think I was possibly getting inaccurate fuel level readings on the gauge because this pin was not even connected to the top-hat, it was stuck in the plastic assembly of the LPFP itself:

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