Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) 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 01-19-2019, 06:46 PM
Member
 
Join Date: Jul 2018
Location: Noway
Posts: 55
norway2 is on a distinguished road
chasing it up and down at low rpm

Hi
I have an X5 E53 3.0L diesel, at 1000-2000 rpm is it chasing it up and down and having unstable rpm, I thought it was the air mass meter that was wrong but it didn't help to replace it - Someone who knows what can be wrong?
Thankful for all suggestions :-)
Reply With Quote

Sponsored Links

  #2  
Old 01-19-2019, 09:04 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
Does diesel use IAC valve ?


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #3  
Old 01-20-2019, 01:03 AM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 4,660
wpoll will become famous soon enough
Quote:
Originally Posted by andrewwynn View Post
Does diesel use IAC valve ?


Sent from my iPhone using Tapatalk Pro
Nope - in fact there is no air control of any sort, not even a throttle butterfly!

The turbo boost is controlled (VNT/VGT) and the fuel is controlled (injection duration etc.) but that's it. Oh, there's a controlled EGR too but that doesn't affect RPM.

For the RPM to hunt either the intake pressure is varying (bad joint on the inlet pipework/intercooler etc.) or the fuel pressure is hunting up and down.

Can you run up INPA and check intake manifold pressure and fuel pressure? Both values can be viewed in INPA....
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
Reply With Quote
  #4  
Old 01-20-2019, 08:39 AM
Member
 
Join Date: Jul 2018
Location: Noway
Posts: 55
norway2 is on a distinguished road
Thanks for the reply, I removed the intake manifoil a while ago to switch the glow plugs, reinstalled it with new seals but of course it may be a gasket that did not fit properly, but I had the problem with rpm before I changed glow plugs but perhaps to a lesser extent.
Suspect that the air mass meter may have something to do with the problem because the problem has varied slightly depending on whether I have used the new or old air mass meter.
I will try to read the pressure on the manifole and fuel pressure today
Reply With Quote
  #5  
Old 01-20-2019, 10:38 AM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 3,831
EODguy is on a distinguished road
Try disconnecting the MAF and see how it runs.

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #6  
Old 01-20-2019, 10:41 AM
Member
 
Join Date: Jul 2018
Location: Noway
Posts: 55
norway2 is on a distinguished road
Does this look right?

Does this look right?
Attached Images
 
Reply With Quote
  #7  
Old 01-20-2019, 04:17 PM
Gregory891's Avatar
Member
 
Join Date: Dec 2011
Location: Switzerland
Posts: 460
Gregory891 is on a distinguished road
If you've replaced the mass flow sensor, have you driven the car enough for the car to reset trim and other values?

What caused your car to all of a sudden start running in a strange way? What specific fault codes do you have? Likley not teh root cause at all, but I assume that your air and fuel filters have recently been replaced and that the PCV filter (which you should replace every 2nd air filter OR update to the vortex type) isn't clogged.

If you have access to a mechanic's smoke machine, you could easily look for an intake or similar leak.
__________________
2002 Euro X5 (E53) 3.0 diesel (M57)
5 speed manual with UUC short shifter.
Pre-xDrive NV125 transfer case (chain & gears).
Factory Xenon headlights, Spyder LED tail lights
Updated vortex crankcase breather.
Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC

Bilstein B6 shocks F&R
Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S).
Dimple magnetic drain plugs in all compartments.

Last edited by Gregory891; 01-20-2019 at 04:43 PM.
Reply With Quote
  #8  
Old 01-23-2019, 02:57 PM
Member
 
Join Date: Jul 2018
Location: Noway
Posts: 55
norway2 is on a distinguished road
Thanks for the reply
Bought the car this summer and found out that the previous owner has run without air filter for a long time and therefore expects that he also has not changed the pvc filter ever ...
did not now that is necessary to have to drive the car for a while for car to reset trim and other values, how far must the car then run before this happens?

Has now received a new error message that I have not had before and which I expect may be the cause of unstable rpm, possibly one of the vacuum hoses may have loosened or something
Attached Images
 
Reply With Quote
  #9  
Old 01-23-2019, 04:10 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 4,660
wpoll will become famous soon enough
I think the most important thing here is the 4530 error code - it's a very generic error code that indicates your boost control isn't working and the boost level is too low when high boost is called for.

From a BMW TIS on error 4530: -

4530 - Charge air pressure control, control deviation, charge–air pressure too low.

CORRECTION
The possible causes for the induction undercharge/overcharge faults are:
Charged air leakage between the turbochargers and the intake manifold;
Air filter or air path before turbocharger clogged;
Incorrect operation of turbochargers actuators (low vacuum supply for VNT actuator, etc.);
Intake manifold pressure sensor malfunction;
Excessive backpressure in the exhaust system.


There's a few things in there to consider. The vacuum hoses are a good place to start, especially around the turbo and vacuum reservoir on the right side.

BTW, the manifold and fuel pressure values you gave above look ok - as far as I can tell from a static value. It would be more useful to see how these vary over time (at idle).

But coming back to your 4530 error, you may need to get a small vacuum gauge test set to diagnose this further, as there are multiple vacuum lines and components that can cause this state/error.

I use a $30 vacuum tester to check mine (after replacing the exhaust manifold in this case): -



In this picture, I'm testing the turbo actuator directly, to ensure the correct movement and travel distance of the actuator rod (and therefore the VNT vanes in the turbo). You can also use this tool to test lines, the reservoir and the pressure modulator.

The pressure modulator is high on my list of "suspects" in your fault but I think you may need to systematically eliminate all the possible causes....

Here's the info. on the boost control: -

https://www.newtis.info/tisv2/a/en/e...tuator/XN2m7mn

and the boost pressure sensor: -

https://www.newtis.info/tisv2/a/en/e...sensor/XWfcH87

Air-mass system tests: -

https://www.newtis.info/tisv2/a/en/e...m-test/XZFEclB

(BTW, there's a line in here I've been looking to find for a long while now - something to indicate that NO X5 E53 ever had swirl flaps - the TIS reads...

Component groups of the air mass system

The air mass system consists of:
  • Charge-air-pressure sensor
  • Intake Air Temperature Sensor
  • Air-mass flow sensor
  • The exhaust-gas recirculation controller comprises the EGR valve, pressure transducer, pneumatic and electrical activation of the pressure transducer
  • The charge-air pressure actuator comprises the turbocharger with adjustment, pressure transducer, pneumatic and electrical activation of the pressure transducer
  • Swirl flaps (in all series except for X5), in cars as of 03/2000 with automatic gearbox
  • Air filter, air hoses, pipes, charge air cooler, exhaust system, etc.

)

Oddly, the code 4530 doesn't seem to come up under the DDE 4.x but it is mentioned in the DDE 5.0 (which I have on my LCI): -

https://www.newtis.info/tisv2/a/en/e...tuator/XcGISOp

Time for a big reading session, my friend! Good luck!!
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)

Last edited by wpoll; 01-23-2019 at 06:36 PM.
Reply With Quote
  #10  
Old 01-23-2019, 04:18 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 4,660
wpoll will become famous soon enough
Oh yeah, you also need to change the xDrive transfer case fluid (use BMW OEM fluid) then reset the VTG oil wear adaptations (using DIS or ISTA).

The Braking-force distribution error seems to be present on everyone's e53! Jury is out on how big a deal it is.

Neither of these have anything to do with your charge pressure issue but I thought I'd mention them...
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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 06:37 AM.
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.