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
  #11  
Old 08-07-2019, 10:49 AM
upallnight's Avatar
Member
 
Join Date: Aug 2012
Location: Cook County
Posts: 7,169
upallnight is on a distinguished road
Did any of the shops perform the basic of all test, a compression test on all the cylinders to determine if all the cylinders are healthy? A weak cylinder will always show up as a misfire and no amount of throwing parts at it will fix a weak cylinder.

They could perform a relative compression test to determine if a cylinder is bad without having to remove all the spark plugs.
__________________
2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
Reply With Quote

Sponsored Links

  #12  
Old 08-07-2019, 11:55 AM
crystalworks's Avatar
Premier Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 5,445
crystalworks is on a distinguished road
I'm unsure of what exact tests were performed as I bought the car after all that had been done under the PO's watch. I pulled the codes on it but didn't spend too much time on it as I just wanted it for parts. It was not a specific cylinder acting up, was more of a surge than a miss. And the surge was not always present either. Would be fine usually when cold started but then present as soon as it started warming up. Sometimes worse than others. Was weird, but again, I was unconcerned. I want to follow this thread as I know the second shop would be interested if a cause is discovered.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #13  
Old 07-15-2020, 03:09 PM
Member
 
Join Date: Apr 2018
Location: Michigan
Posts: 7
dkuchan is on a distinguished road
I do not believe the shop did a compression or leakdown test. I can see that causing the misfire codes, but that's not currently my problem (at least the not the biggest one). I still have this idle issue with the car and have been simply dealing with it for years now. I just let the car idle for 90 seconds, it stumbles and surges, and then it's good to drive.

I thought that it was the secondary air system once I realized that this system runs for exactly 90 seconds on cold-start. I thought I must have a bad air pump or a sticky valve, etc. However, even though the documentation I have found shows this system and its parts, I do not appear to physically have this system on my N62 like the literature states I should. I don't know if someone deleted it or if my particular model year just didn't have it or what, but now I'm back to trying to figure out what happens at 90 seconds on cold-start that triggers this.

I can say that it starts fine, idles ok for a bit, then surges a tiny amount for a while (like 100rpm) until at 90 seconds something happens and it surges and the rpms jump up and down wildly and then level out. It shakes the car. I can also say that it sounds like a small exhaust leak during this 90 seconds which I haven't tracked down yet, but it sounds like the drivers side of the engine. It goes away after the surging. This surging period only lasts about 5 seconds.

It's as if there is a valve or something opening/closing at 90 seconds and the computer is having trouble dealing with the inputs prior to. I have a cheap scanner and it shows that the timing is being retarded prior to 90 seconds, and after 90 seconds it's advancing. I don't know if it's seeing knock during that period or what...maybe that exhaust leak sound (whatever it actually is) is tripping the knock sensor?.?.?...

I FINALLY have a spare car now so I don't have to be terrified to work on it, so hopefully I can make some progress or get up nerve to sell this pile.
__________________
2004 - E53 - 4.4i (N62B44)

Last edited by dkuchan; 07-15-2020 at 03:15 PM.
Reply With Quote
  #14  
Old 07-15-2020, 04:07 PM
X5only's Avatar
Premier Member
 
Join Date: Feb 2008
Location: Bellevue, WA
Posts: 1,128
X5only is on a distinguished road
Have you taken a look at this thread? Sounds so much like your issue.

https://xoutpost.com/bmw-sav-forums/...-stumbles.html
__________________
'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.
Reply With Quote
  #15  
Old 07-15-2020, 04:35 PM
bcredliner's Avatar
Premier Member
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 7,500
bcredliner is on a distinguished road
To be clear I understand---It is always 90 seconds after a cold start?
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #16  
Old 07-15-2020, 09:06 PM
Member
 
Join Date: Apr 2018
Location: Michigan
Posts: 7
dkuchan is on a distinguished road
I have not read the the thread about the oil fill cap, but the shop told me that they checked for vacuum leaks. Thank you for sharing and I will certainly look into it. It would be amazing for something like that to be the problem!

As far as the 90 seconds goes; it has been 90 seconds every time I have timed it on a cold start. Now, if the car is hot, I have no issue. I can just get in and go, but if it sits long enough (even just a half-hour) it'll come back. I have not timed a "warm" start but it would be a good experiment.
__________________
2004 - E53 - 4.4i (N62B44)
Reply With Quote
  #17  
Old 07-15-2020, 09:22 PM
Member
 
Join Date: Aug 2010
Location: Burlington, NJ
Posts: 795
amancuso is on a distinguished road
90 seconds? This is the the intermediate lever issue.
__________________
2004 4.8iS
Check out the BMW CCA X Chapter on Facebook - https://www.facebook.com/groups/603822583674050/
Reply With Quote
  #18  
Old 07-16-2020, 12:21 AM
X5only's Avatar
Premier Member
 
Join Date: Feb 2008
Location: Bellevue, WA
Posts: 1,128
X5only is on a distinguished road
Quote:
Originally Posted by amancuso View Post
90 seconds? This is the the intermediate lever issue.
Yeah, I thought too that's another thing Dkuchan should check out. When I did the valve stem seals, I made sure to verify the IL were the updated ones.

https://xoutpost.com/1148167-post7.html

Dkuchan, do a search on Intermediate lever subject line in this forum.
__________________
'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.
Reply With Quote
  #19  
Old 07-16-2020, 07:31 AM
Member
 
Join Date: Aug 2010
Location: Burlington, NJ
Posts: 795
amancuso is on a distinguished road
Quote:
Originally Posted by X5only View Post
Yeah, I thought too that's another thing Dkuchan should check out. When I did the valve stem seals, I made sure to verify the IL were the updated ones.

https://xoutpost.com/1148167-post7.html

Dkuchan, do a search on Intermediate lever subject line in this forum.
Interesting factoid here. My 2004's IL's weren't in the range for the faulty ones. However, after the VSS job, the weird idle went away.
__________________
2004 4.8iS
Check out the BMW CCA X Chapter on Facebook - https://www.facebook.com/groups/603822583674050/
Reply With Quote
  #20  
Old 07-16-2020, 12:21 PM
Member
 
Join Date: Apr 2009
Location: Ohio
Posts: 1,043
Purplefade is on a distinguished road
N62B44 - Idle Surge - Jumpy Throttle at Idle Speed

Just following along with the thread, in regard to the throttle body and the valvetronic working in unison the throttle body stays wide open pretty much all the time and the “air metering” if you will, in to the cylinders is done by the valvetronic, the valves act like little throttle bodies on each individual cylinder, cylinders fill based on the lift of the valvetronic not the “openness” of the actual throttle body. (The throttle body is actually part of the traction control system and will “flap” shut to lower or kill power to the engine.)

In regard to the unusual idle and low power on cold starts, when I say cold I mean ambient engine temperature probably under say 40 degrees fahrenheit, that does sound suspiciously like the intermediate levers - I experienced a similar issue after doing my VSS job and was able to resolve it by correcting the banks solenoid plugs, I had inadvertently flipped the plugs on the driver side (LHD) side vanos, note it is the opposite of the passenger side - short side of the harness goes to the inner vanos and long side goes to the outer. And I see you do mention replacing the solenoids - good call on using BMW solenoids too .

Fixing that problem I was able to really smooth things out by resetting the valvetronic with my Foxwell and having it relearn it’s lift settings and adjustment values.

Not sure this will help, fingers crossed it does, but may also spawn some more creative thinking


Sent from my iPhone using Xoutpost.com
Reply With Quote
Reply

Bookmarks

Tags
idle, jumpy, lunge, surge, throttle

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 02:36 PM.
vBulletin, Copyright 2021, 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.