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06-08-2013, 04:09 PM | #1 |
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Low pressure fuel sensor replacement
Hey guys, I got the low pressure fuel sensor and I'm about to undertake the task of swapping out the bad one but I can't seem to find any DIY's to help me out. Anyone know of one, all I find is one for the 5 series N54 but seems things are a bit different with the vs our 135's.
EDIT: DIY BELOW Last edited by MIAblu1; 06-16-2013 at 09:35 AM.. |
06-08-2013, 04:20 PM | #2 |
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BEFORE working on your car don NOT forget to disconnect your car battery. The starter sits very close to the low pressure sensor. I can't think of a worse scenario than a wrench shorting out on the starter batter cable and fuel spraying everywhere!
Maybe these l;inks will help you. I don't think there is a DIY per se. Maybe shoot some pics and help your community out! See post #9.... http://www.1addicts.com/forums/showt...64#post5752164 http://www.e90post.com/forums/showth...=286527&page=3 http://www.e90post.com/forums/showth...ht=VACUUM+HOSE
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06-08-2013, 09:11 PM | #3 | |
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06-09-2013, 12:27 AM | #4 |
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My LPFP sensor is dying as well. Been getting the code 29f3. Been having stutter and hesitation issues at WOT and only hitting 10.7psi of boost on my Cobb ST1 Agg tune (before i was getting 15-16psi). I have CPO so I will try to have the dealer change it. If not I am going to attempt to replace it myself. Thanks for the links Dack!!
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2008 135i Mods: MHD/AFe/ER/Synapse/VRSF/Berk/Cobb |
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06-09-2013, 09:57 AM | #5 | |
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06-09-2013, 10:05 AM | #6 | |
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Second, my charge pipe seems to have this device as seen in the picture below connected to it. I read it's a baffle of some sort? can I remove it and block it's connection off as I've seen with some other pictures of people's charge pipes? I mean, most pictures I've seen of other people's stock charge pipes don't have it and is just a round flat surface where it WOULD go if there were one.... |
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06-09-2013, 11:13 AM | #7 | |
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2008 135i Mods: MHD/AFe/ER/Synapse/VRSF/Berk/Cobb Last edited by adevangel84; 06-09-2013 at 11:25 AM.. |
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06-09-2013, 12:02 PM | #8 |
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^^That device is the "sound generator". Yes you can remove it. Its basically a sound muffler from what I understand. I believe all N54 cars have it.
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06-09-2013, 01:30 PM | #9 |
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Ok... so changed the sensor and here's a slight walk through/write up.
http://www.activeautowerke.com/pdf/A...ff%20valve.pdf To start with, you remove your intake system(Mine are DCI so it's quick removal)... I then used the links provided above to remove the charge pipe. Note: To remove the DVs you have to twist the grey rings themselves clockwise. I used small vice grips to grip them and make it easier to turn them and pulled the DV's up and out. I then removed only the hose connected to the DV closest to the front of the car and simply moved the DV's to the side and removed the charge pipe. Next, I removed the throttle body which consists of just four bolts Some people removed the intake manifold and what not but honestly i was able to get to the sensor by simply removing charge pipe, throttle body and moving a small wire box out of the way and used the small vice grip the remove the sensor. And here's the little bugger Lastly, since I had the DV's and charge pipe out, I took the liberty of changing the hoses to the DV's for hard rubber lines since I've read people have gotten leaks from the flimsy stock hoses And also I removed that "sound baffler" mine had since its an '08 and capped off the outlet with a rubber cap I picked up for $3 at Home Depot. End Result.... I put everything back together, double checked it all and STILL HAVE THE "ENGINE MALFUCTION" issue and car still runs like crap.... This coming after the BMW stealership swore it was due to the sensor being bad according to their diagnostic test. But at least if the sensor was indeed bad, I've both helped you guys out with this write up I hope and I've replaced a faulty part regardless that'd need replacing. |
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06-09-2013, 01:58 PM | #10 | |
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Thanks for the update. So... does your car still have an issue? What is the next step? Also... that $3 rubber cap your picked up at Home Depot - do you really think that can withstand 15+ PSI(you have a tune no?) over time along with the heat of the engine bay? I would have replaced the CP with a aftermarket one.
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06-09-2013, 02:00 PM | #11 |
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Never mind. I see you said its your HPFP in this other thread...
http://www.1addicts.com/forums/showthread.php?t=850963
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06-09-2013, 02:27 PM | #12 | |
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I'm going to get in contact with the dealer and demand they change the HPFP and reimburse me the charge for the diagnostic which would've otherwise been covered under warranty work replacing the HPFP. |
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06-12-2013, 01:25 AM | #13 |
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Were you able to resolve this from your dealer? My dealer won't change it bc I don't have a CEL.
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06-12-2013, 05:05 PM | #14 | |
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06-24-2013, 06:41 PM | #16 | |
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http://www.1addicts.com/forums/showthread.php?t=855257 |
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08-31-2015, 07:44 PM | #17 |
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This was a great write up, just did it on my 335i.
Just wanted to point out what someone else said, the section of line the sensor is attached to was updated as the vibration kills the sensor, the new line has a new style sensor that is supposed to be more vibration prone. Old sensor is 13537614317 New line with new sensor is 13537622751 and requires a new retainer bolt 13537582770 Old sensor is $80, new line with sensor is $150 - it is a bit of work to get down there so I opted for the new parts so I hopefully don't have to do it again. Line is very easy to replace, one end is threaded, other is a simple push to lock unlock connection - almost easier than getting the sensor off.
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11-25-2015, 12:29 PM | #18 | |
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thanks for the DIY, it was really helpful... I made a little video: http://www.e90post.com/forums/showth...7#post18968987
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04-26-2016, 07:30 AM | #19 |
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Thanks for this post. I've been having some issues with my fuel system and am going to start by replacing the sensor.
Does anyone know if the new fuel line (https://www.ecstuning.com/Search/13537622751/ES2698645/) will fit the N55? I have a 2011 135i e82. Cheers |
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