525i - Engine surging - high RPM - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 03-02-2004, 11:52 AM
ron
n00b
 
Join Date: Mar 2004
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ron is an unknown quantity at this point
(Thread Starter)
Help - long standing problem. My 525i Vanos engine is surging at highway speeds when under load (climbing hills). The surging is steady at a frequency of once per second. The problem occassionally, but not always, is alleviated after a tune up but invariably returns after a couple of weeks. I have replaced fuel filter and cycled a spare coil through each of the 6 positions with no obvious improvement. Is it likely that there is more than one defective coil? I welcome suggestions. Thanks.
ron is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-04-2004, 08:14 PM
2nd Gear Member
 
EXtech's Avatar
 
Join Date: Jul 2003
Location: Texas
Posts: 497
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
EXtech is an unknown quantity at this point
I would start looking towards a fuel pressure or fuel delivery issue. Quite possibly a fuel pressure regulator.

STETT Performance -
Everything BMW
921 J Place, Suite 200
Plano, TX 75074
469-767-3309

OEM Repairs and Maintenance
Extended Warranty Service
Pre-Purchase Inspections
Everything Performance (brakes, turbos, Nitrous, Cams, Complete Engines, Clutches/Flywheels etc)
-----------

STETT Performance Official Grand Opening BMW Meet, May 6th 11A-3P -- Music, Food, Drawings and Tons of BMW's go to http://206.123.107.13/stett and register.. it's FREE
EXtech is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Synthetic Oil and filter CiscoKid 3-Series (E36) 47 04-14-2014 07:00 PM
Audi A3 1.6 FSI AZ325Ci Other Rides 2 09-06-2003 02:25 AM

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

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