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      08-13-2018, 12:55 AM   #1
535XrayIndigo
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29f2 code - replaced almost all fuel parts am I missing something?

Hey all,

I am getting a 29f2 code and rough startup. Almost like a misfire. However it goes away when the car goes to limp mode.

I have only Dual cone filters. No other mods.

Started running rough after hpfp replacement. I am thinking I got a bad one. If from the forums it appears this is code is common after replacing a hpfp. I also got cylinder 6 misfire so I replaced the injectors and the plugs and coils. I had a small leak from the lpf sensor line. Got that taken care of hoping that was it. Now I am at my wits end. Should I replace the hpfp again. Got it from FCPeuro so replacement cost is not a concern. I have seen injectors fix it for others. Misfire code is gone only the 29f2 code remains

Does anyone know exactly what causes this code?

Last edited by 535XrayIndigo; 08-14-2018 at 01:05 AM.
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      08-13-2018, 08:29 PM   #2
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After doing some research can anyone point me to a guide on how to reset hpfp adjustments?
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      08-16-2018, 12:30 AM   #3
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Bump.

Looking for some help here. All of the threads I can find on the 29f2 end abruptly once the op figures it out and/or moves on without sharing a solution or reference a thread or site that is no longer active.
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      08-16-2018, 01:10 AM   #4
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Man that sucks, I'd try another HPFP. Could diagnose better if you have BMW specific scan tool or tune to see the HPFP values. Could also be the low pressure fuel sensor.
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      08-16-2018, 01:28 AM   #5
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I currently have inpa. Is there not a way to do it with that?
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      08-16-2018, 07:45 AM   #6
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Quote:
Originally Posted by 535XrayIndigo View Post
I currently have inpa. Is there not a way to do it with that?
From memory I don't think INPA has the capability to display that info.
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      08-16-2018, 10:55 AM   #7
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I am going to try resetting adaptations. Do you know which adaptation manages open loop pressure.
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      08-16-2018, 11:58 AM   #8
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Quote:
Originally Posted by 535XrayIndigo View Post
I am going to try resetting adaptations. Do you know which adaptation manages open loop pressure.
That would be outside the scope of INPA. It can reset all the adaptions for the car. But that term is in reference to an adjustment value used in piggybacks ex jb4. Unless your using a piggyback flash it won't apply in your case.
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      08-19-2018, 04:04 PM   #9
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Quote:
Originally Posted by nOshi View Post
That would be outside the scope of INPA. It can reset all the adaptions for the car. But that term is in reference to an adjustment value used in piggybacks ex jb4. Unless your using a piggyback flash it won't apply in your case.
Just to keep everyone updated as many of these threads die once the OP fixes the issue without follow up. I was able to follow the steps in the fuel it guide to reset fuel valve adaptations https://www.dropbox.com/s/fx6brmnn1y...tions.pdf?dl=0

It idled well and got rid of my 29f2 code. So if you are getting this code the fuel valve adaptation may be the fix.

Took the car for a drive and when I got on it I got a 29dc code. Checked and the leak is back. It appears to be right under the lpf Sensor. I will be replacing the line and replacing the new hpfp just to be sure.

Last edited by 535XrayIndigo; 08-19-2018 at 08:12 PM.
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      08-26-2018, 05:54 PM   #10
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Went to replace the lpf Sensor line and the thermal compensator fell right off of the hpfp. this is the silver round piece just below the hpfp sensor connection. Anybody have experience with this. Hopefully this has been the cause. Replacing the lpf Sensor anyway as it $140 and I can have piece of mind knowing if it fails I can send it back.
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      09-02-2018, 11:38 PM   #11
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Car runs great after replacing hpfp. Was able to use a scope to check the valves and they are nasty. Due for a good cleaning.
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