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      03-11-2024, 04:37 AM   #1319
GSB
Electronics Engineer
United_States
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Drives: 2008 335i E92 Coupe (N54 6MT)
Join Date: Dec 2012
Location: Vancouver, WA

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Quote:
Originally Posted by iqraceworks View Post
I'm hoping someone might be able to help me out....I was driving home the other day and all of a sudden the car lost power. I limped home and scanned for codes....29DC injector Cutoff. After I restarted the car....it ran smooth again, no issues.

Then I took the car for a drive and recorded a log. As you can see....as soon as I rolled into the throttle, the HPFP pressure started to climb, all of a sudden it took a dump and fell to 400psi....causing another 29DC injector Cutoff fault.

Is this what happens when a HPFP starts to fail? Or is something else going on? It's odd how it fires up and idles fine....but as soon as you put a load on the motor and the pressure starts to built....it just falls on its face. Replace the HPFP??

https://datazap.me/u/iqraceworks/log...ta=1-2-5-12-21
I experienced the same symptoms. Never a single long crank. I also replaced my HPFP with a brand-new BMW pump from FCP Euro. All symptoms vanished (except the extreme sticker shock and usual extortion from BMW).

Last edited by GSB; 03-11-2024 at 05:12 AM..
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