Misfiring at 5,500 rpm or higher with little to no engine load - Page 5 - BMW M5 Forum and M6 Forums
E39 M5 and E52 Z8 Discussion 1998-2003 Advertiser's Forum

 27Likes
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #41 of 47 Old 13th April 2019, 04:15 AM Thread Starter
SupercarFreak
Member
 
Join Date: Jun 2014
Location: Suffolk, VA
Age: 36
Posts: 34
Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by boris1 View Post
At this point you know the solution. Buy the proper BMW spacer #9 and if you want to go all out, but a new crank position sensor, although that is not really necessary. If it runs fine now, then little scraping of the crank sensor isn't impacting its performance.

I ordered the spacer and a new Hella sensor last night. I'm so over this problem. It has basically had this issue since I've owned it and I've never been able to figure it out. I've been able to fix everything else wrong with the car on my own, one thing at a time, but not this. Thanks so much for your help. The car is really sorted now, it's a great feeling. Plus I'm switching to 10w60, I've been running 5w30 like an idiot.


Thanks to everyone for your ideas and advice. A lot of the things mentioned aren't a bad idea to replace anyway on a 16 year old 70k mile car.


You guys rock



Alex

Last edited by SupercarFreak; 13th April 2019 at 04:17 AM.
SupercarFreak is offline  
Sponsored Links
Advertisement
 
post #42 of 47 Old 13th April 2019, 11:17 AM
curtissp321
Fellow Member (>400)
 
curtissp321's Avatar
 
Join Date: Jan 2014
Location: Gloucestershire, UK
Posts: 423
Thanks: 86
Thanked 64 Times in 48 Posts
What a great result - interesting problem as well. I seem to recall the Ďbookí talks about using multiple spacers if need be. Looks like you car never had any at all or perhaps misplaced in a clutch change...

Simon
curtissp321 is offline  
post #43 of 47 Old 13th April 2019, 01:34 PM
technician117
M5 Guru (>2000 posts)
 
technician117's Avatar
 
Join Date: Nov 2010
Location: Sanborn, NY
Age: 33
Posts: 2,352
Thanks: 116
Thanked 284 Times in 244 Posts
Garage
As a point of reference, not all cars had a shim. I don't know how it was measured to determine if a shim was needed or not, but I've actually never seen one in person. I've done clutch jobs on at least 5 or maybe 6 different m5's. None had the shim.

Glad to see you're getting the problem sorted. This is not a common solution to your symptoms!

Tim

2013 M5 Imperial Blue/Silverstone II, 6MT 50k miles

2000 Anthracite daily driver
UUC dssr and shifter
Supersprint headers with Tubi catback
Jailbreak tuning
Dinan 3.45 JED lightened flywheel
282,000 miles and counting

'00 Imola/Imola 104k,
'00 Silverstone/Silverstone 129k (SOLD)
technician117 is offline  
 
post #44 of 47 Old 14th April 2019, 01:38 AM
Sailor24
M5 Expert (>4000)
 
Sailor24's Avatar
 
Join Date: Oct 2010
Location: Cobourg Ont
Age: 57
Posts: 9,673
Thanks: 985
Thanked 1,964 Times in 1,648 Posts
I am suspicious of something else, maybe you can shed some light. The buildup of crud on the sensor seems very rare, I have not seen it nor have I seen even much dirt on the inside of the bell. How about you? Oil yes but even that seems to wash clean? Wondering if something else is going on ?
Sailor24 is offline  
post #45 of 47 Old 6th May 2019, 08:36 PM Thread Starter
SupercarFreak
Member
 
Join Date: Jun 2014
Location: Suffolk, VA
Age: 36
Posts: 34
Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by Sailor24 View Post
I am suspicious of something else, maybe you can shed some light. The buildup of crud on the sensor seems very rare, I have not seen it nor have I seen even much dirt on the inside of the bell. How about you? Oil yes but even that seems to wash clean? Wondering if something else is going on ?

I don't think anything is abnormal from what I've seen. I've done a bunch of clutches and the sensor is generally pretty dirty along with the bell housing. It's just friction disk material buildup from what I can tell.
SupercarFreak is offline  
post #46 of 47 Old 6th May 2019, 08:39 PM Thread Starter
SupercarFreak
Member
 
Join Date: Jun 2014
Location: Suffolk, VA
Age: 36
Posts: 34
Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by M3Fan View Post
FWIW I used this guy for my injector cleaning and he did a great job. Very thorough and knowledgable, quick, easy to deal with. Place Order ? Rosch Fuel Injector Cleaning Services

Thanks for the link! I just shipped my injectors to them today.


After 4-5 tanks of fuel injector cleaner car still has the same problem. Installed new crank sensor and BMW shim- no change.


Fuel filter comes tomorrow, already have a new pressure regulator.


Will keep everyone updated.
SupercarFreak is offline  
post #47 of 47 Old 6th May 2019, 10:33 PM
TMcNasty
M5 Guru (>2000 posts)
 
TMcNasty's Avatar
 
Join Date: Jul 2008
Location: Ewing, NJ
Posts: 3,268
Thanks: 414
Thanked 518 Times in 356 Posts
Personally I would have changed the FF first. Plenty of threads I recall from back when I joined (2008) where high-rpm faults were fixed simply w/ the FF being replaced.
TMcNasty is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
S50B32 chain tensioner upgrade for the S38B36 and S38B38 raymondw E34 M5 Discussion 90 24th January 2018 08:19 PM
Dyno results are in. boots F10 M5 Discussion 77 6th February 2013 01:43 PM
Delimited E55 does 190+ sdstarnes GTBoard.com: General Sportscars 154 19th February 2006 04:49 PM
Optimal Shift Points-it's at 7000 KirklandM5 E39 M5 and E52 Z8 Discussion 26 14th June 2001 12:58 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome