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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > 2011 X3 N55 fuel issue



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      03-21-2023, 02:43 PM   #1
Hollandazedd
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Hi,

I’m currently having a fuel issue with my X3. The car severely struggles Wot at 3k. The car had died twice on me after about 30 minutes of driving also. Once in parking lot, and once on highway. Unfortunately I don’t have access to ISTA, and trying to rule everything out. Shop says Hpfp due to codes. I have no long cranks, and the car doesn’t just die when hpfp if I’m correct. I’m suspecting LPFP due to the car just dying or EKP module overheating, but would have to have EKP codes then? Any info appreciated.

Codes are

110001 - cylinder set injectors cut off, pressure too low.

119404 - rail pressure sensor stuck

11a002- fuel pressure too low in high pressure.
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      03-21-2023, 10:11 PM   #2
Hollandazedd
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I’m planning to go MHD, If I buy MHD, can I log my lpfp and hpfp and pin point the problem? What about MHD and ekp?
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      03-22-2023, 12:30 AM   #3
fastboatster
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If you have an x3 as it says, then skip the mhd and go with bootmod3 instead. You can probably log these parameters with either, but bm3 is way better than the mhd for the f chassis vehicles.
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      03-22-2023, 11:08 AM   #4
Hollandazedd
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Quote:
Originally Posted by fastboatster View Post
If you have an x3 as it says, then skip the mhd and go with bootmod3 instead. You can probably log these parameters with either, but bm3 is way better than the mhd for the f chassis vehicles.
Ok thanks for the input. What are some of the big advantages of bm3 vs MHD?
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      03-23-2023, 11:10 AM   #5
fastboatster
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Quote:
Originally Posted by Hollandazedd View Post
Ok thanks for the input. What are some of the big advantages of bm3 vs MHD?
This actually might be my subjective and not necessarily completely correct opinion. Please compare these 2 yourself and decide which one you want to go with. Bm3 seems to be more popular on the f chassis platforms, though.
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