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HPFP failure FAQ!
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03-29-2024, 04:23 AM | #1321 |
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06-23-2024, 02:25 AM | #1322 |
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help
Hey guys relatively new to cars and bimmers in general and had some questions about some codes. Lately my car has been shutting off randomly not super often but every once in a while. At times the power will feel normal but other times i have to push the throttle all the way down to get to 4k rpms. The service engine light and half check engine light come and go usually after i turn off the car for a bit. Thought it was a vaccum line issue so i replaced one and I dont hear air leaking anymore but still has some of the same problems.
Codes: - DME active codes - 2774 - Air volume, plausibility: Air volume too high. 2BC1 - Mixture control: Fuel-air mixture too rich. 2C01 - High pressure fuel, plausibility Pressure too low. 375C - DME, protection against tampering: Program or data manipulation detected. 387F - Power management: Standby current violation. - DME shadow (inactive) codes - 2BDE Fuel high pressure on enabling of injection: pressure too low Mods installed: Catless dp stage 1 tune bms intake vrsf chargepipe Car-2011 335i n55 Any help helps! |
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06-25-2024, 02:07 AM | #1323 | |
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2C01 - High pressure fuel, plausibility Pressure too low. 2BDE Fuel high pressure on enabling of injection: pressure too low These two codes may indicate a High Pressure Fuel Pump beginning to fail. The pump often fails intermittently. For example, you might have full power until you hit a certain RPM or engine load. Then it conks out and throws codes until the next engine restart. The rich mixture might be related to the pump, or the result of injectors sticking open, or fuel rail sensor failure, or a weakening battery, or your DME tune, etc. You could preemptively replace the pump, but that's an expensive roll of the dice. To be sure, you need a scan tool to watch the low-pressure fuel vs high-pressure fuel as you drive (live data). The high-pressure fuel supply should be approximately 10x higher than low-pressure fuel supply at all times. |
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06-25-2024, 08:12 PM | #1324 | |
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06-27-2024, 03:17 PM | #1325 |
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08-15-2024, 03:08 PM | #1326 |
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09-02-2024, 03:02 PM | #1327 |
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Hi All,
I am going to have a go at repairing my HPFP before buying another one. It looks like the issue was an oil leak past the seal on the drive wheel. So I'll top it up with oil and put in a new seal. Has anyone found supplier in the UK for this seal please ? It is a KACO seal made of rubber with what looks like a metal band on the outer and radius and a spring on the inner one. The size is 22mm outer diameter, 11mm inner diameter and the thickness is 7mm. The car is a 2008 330i with 131k miles on the clock. Cheers Richard |
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09-06-2024, 07:10 PM | #1329 |
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09-09-2024, 05:07 AM | #1330 |
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Can't help you with a UK source, but I have done this repair to 2 hpfps, and it certainly works. Here in South Africa, I found the seal from a hydraulics shop.
I did run into an issue, where the new seals were being pushed out by the internal pump pressure. Had a machine shop cut a groove for me, inserted a circlip, and problem solved! |
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09-16-2024, 03:00 AM | #1331 | |
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Furthermore, I have little confidence in Continental because they manufacture that disgustingly unreliable N54 water pump with a plastic impeller housing that cracks. I complained after my 5th pump cracked and I was told that they have no intention of upgrading it because it only has a 1% failure rate. Lies! Outside of their pathetic warrantee, that thing has a 100% failure rate. |
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09-16-2024, 03:05 AM | #1332 | |
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09-16-2024, 03:32 AM | #1333 |
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Its been more than a year now, and still going. And yup, you are indeed correct. Plenty of bits that can go wrong. Bellows splitting, bellow o-rings going bad, solenoid failing and so on. All the seals can be replaced, but replacement bellows are to my knowledge, not available. Although these could be scavenged from another pump. Where there's a will, there's (usually) a way!
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09-17-2024, 01:52 AM | #1334 | |
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09-25-2024, 05:33 PM | #1335 |
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I had with 180k km also the HPFP failure. The large one which is placed underneath the alternator. I ordered 2 cheap ones from ebay. had no luck. then I discovered a self repair DIY video showing how to refill with hydraulic oil inside at the 3 pistons. I did, then for a certain time I was ok.
I decided to buy after the 100€ or 200€ ebay pump, the BMW authorised dealer leebmann24.com here in Germany for 950€. Since then that issue did not happen again. I have from my entrepreneurship here in Berlin best hydraulic shop for seals and oil for manufacturing machines or construction/transporters. But for a HPFP in a BMW (sexy heat machine!!) needs for me in Central Europe a working temperature range from -20 (cold start in extreme winter) to approx. 60 degrees Celsius of HPFP working temperature in Summer with warm motor. That's why and due to injectors protection, I decided for the "proper" HPFP. |
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09-29-2024, 03:42 AM | #1336 | |
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