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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > USA - California > E92 n55 Sputtering at 4K rpm



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      10-31-2025, 11:53 PM   #1
Anthonyoro3
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E92 n55 Sputtering at 4K rpm

I have a 2011 bmw 335i n55 e92 and I’ve been struggling to find the problem with my car, it is fbo, stage 2 lpfp is 1 year old, it has a brand new hpfp, new rail pressure sensor, 1 year old fuel pressure regulator, battery was replaced last year, the engine comes on when motor is cold and it runs fine until the engine warms up after about 30 minutes of idle the engine starts dying and then shuts off, I’ve attached some photos of some logs I took using mhd, I’m currently tuned on 91 stage 2+ with mhd, before the car dies it runs fine until i do a pull at WOT and around 4K rpm the engine sputters horribly and doesn’t let me get past 4K rpm, if you guys have any idea please let me know, I’ve been trying to figure it out forever now. One graph is me doing a second gear pull and the other graphs are when the car was idling and it shut off after about 30 minutes, please help, I don’t want to just keep replacing things that aren’t the problem.
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      11-11-2025, 08:35 PM   #2
autoart
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Where did you get the HPFP?
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      11-12-2025, 09:15 AM   #3
Anthonyoro3
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Quote:
Originally Posted by autoart View Post
Where did you get the HPFP?
Picked it up from a near by shop called rancho foreign, do you think it can be the new pump still?
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      11-15-2025, 05:16 PM   #4
autoart
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log your fuel psi
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