Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-13-2019, 01:06 AM
Member
 
Join Date: May 2010
Location: Australia
Posts: 14
simt is on a distinguished road
caught diesel injector failure on Inpa

Hi all,
I wanted to share this to add to the community knowledge base.

I had a diesel injector die on our bmw X5 3.0sd (35d) with the M57TU2 engine.
I was lucky enough to have actually caught the signs of it failing in Inpa hours before the injector failed.


https://youtu.be/FicbKEFSSgI

Have a look at Cylinder 5.

We were heading out to family in the country on a 6hr drive. My wife was taking a turn driving, I had the laptop in the car, so on a whim checked out the live data with Inpa and saw what cylinder 5 was struggling. I think 'Selective Mass Adjustment' is similar to fuel compensation or some such. 3 hrs later and only half an hour from getting into Mildura the car died. I've had two injectors die on me before and I knew this was exactly the same thing. -The car's driving along just fine, and at first you don't even notice that the engine has died. It's only when you wonder why you're slowing down and try the accelerator and nothing happens, that you peg the engine has died.
I also know that usually with the first engine stall, you can restart the car and keep driving for a while. Which is what we did. I'm happy to say we got to our final destination a half hour later with no further difficulties.
(With a dead injector it's the next day where you can't go any further. The car will start fine, but as soon as it's up to temperature, the slightest acceleration kills the engine.)

When we got in that night, I got this code: "0042FB DDE: Injectors, cyl 4, 5, 6, activation" which odometer wise related to the moment we stalled. The next day I pulled the intake manifold and checked the ohm resistance on every injector. They were all fine (180k Omhs +/- 5k) except for cylinder 5 which was like 25k Ohms.

I'm really glad I caught that behaviour in Inpa, I'm going to try and see if it's something I can access through a PID on Torque Pro with my phone and an ELM327 adaptor.

-Simeon
Reply With Quote

Sponsored Links

  #2  
Old 04-13-2019, 01:36 AM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 6,731
ard is on a distinguished road
Talk about serendipity!


I mean who lets the wife drive so they can peruse engine stuff WHILE on vacation?!?


Seriously though. talk about chance...



Thanks for posting it. Update once you get it fixed.
Reply With Quote
  #3  
Old 04-13-2019, 02:18 AM
Member
 
Join Date: May 2010
Location: Australia
Posts: 14
simt is on a distinguished road
I wanted to add a few notes about 2nd hand injectors and no urgent need to code them:

After buying the first two injectors brand new, this time I bought a 2nd hand one. They're really expensive new! And before you start thinking, 'Gees, if he's replaced three already - isn't that an argument for doing all 6, and brand new?!'
Well... no. I don't believe these injectors go bad on their own. Outside forces, mainly moisture, is what kills them.

The first injector I replaced, around a year ago, was the well known and classic Cylinder 5. There's much already written about this. Basically a design flaw causes moisture to get to the top of that injector and over the years corrosion slowly sets in and causes the injector to die.
The 2nd and 3rd injector failures I'm sad to say were pretty much my own fault. About 6 months ago I had to replace my DPF, and because of issues with the replacement (Check out some of my other youtube videos) the car was up on stands and in pieces for about two weeks. In that time, whilst I thought I had properly covered the engine - I hadn't and there was water sitting in injectors 5 and 6 at the back of the engine. They would have been in the water for a week. They both measured around 175k, I thought I'd be okay, but I was wrong. Injector 6 died two months later. And the brand new injector 5 died a few months later, now on our trip. (At the time I replaced 6, injector 5 was measuring around 167k Ohms.)

I started looking for the best price I could find for an injector. Having spent over $800 on the first two, I wasn't keen to keep spending more on the third. So I was interested when I found a local wrecker selling 2nd hand ones on Ebay. It's funny, when I turned up at the place asking for the injector, he said give him 5 mins and he'd go pull it from the engine he had. I asked him if it could be one of the front ones, 1, 2, or 3, away from the back of the engine. He gave me a knowing look and asked if it was Cylinder 5 I'm replacing. (Which it was, but not for the reason he was thinking.) I tested its resistance before handing over the cash.

As far as I know injectors 1-4 are all original and working fine. Sure there's always a small risk, but getting a 2nd hand injector should be no worst or better than what I've already got in there.

Regarding the coding. There's people who say you don't need to code replacement injectors, others who swear you do. -From my experience, you don't need to worry about it, the engine adapts anyway.
The coding is to better inform engine management of the injectors response behaviour, so that the computer can more precisely control the fuel delivery. I had coded my first two new injectors. But didn't see the point in doing it this time around as the 2nd hand injector couldn't possibly still match its listed values. I checked the 'selective mass adjustments' after the replacement. On the first drive that injector was a bit all over the place, and I was worried that I had bought a dud. However over the next few days it got better and better and two days later it's indistinguishable from the other injectors. Case in point - the engine will adapt.

-Simeon
Reply With Quote
  #4  
Old 04-13-2019, 02:22 AM
Member
 
Join Date: May 2010
Location: Australia
Posts: 14
simt is on a distinguished road
I know. You're spot on.

It's been about a month now since I replaced the injector. Keeping an eye on it with Inpa. Has been absolutely fine so far.

I hope to try and find a way to monitor the 'selective mass adjustments' with an ELM327 OBD2 adaptor. So much quicker, easier, (and more likely that I'll do it regularly) than using the laptop and cable.

Quote:
Originally Posted by ard View Post
Talk about serendipity!


I mean who lets the wife drive so they can peruse engine stuff WHILE on vacation?!?


Seriously though. talk about chance...



Thanks for posting it. Update once you get it fixed.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 09:57 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.