GO FISHING, use SLABSAUCE Fishing Attractant
Results 1 to 2 of 2

Thread: Balancing the throttle bodies with the Carbtune tool

  1. #1

    Default Balancing the throttle bodies with the Carbtune tool

    The previous owner told me he balanced the throttle bodies, however, in the interest of learning how to do this myself I purchased a Carbtune tool to help with this maintenance step.




    The Carbtune allows you to view 4 of the TBs at the same time which I think is a big bonus in doing this maintenance vs. doing each TB individually.



    They include some small orifice tubing to make restrictors otherwise the rods bounce up and down too much to get a reading. Since I already designed an inline restrictor for the gauges I sell I chose to use that instead






    Plugs on the vacuum ports removed, lines plumbed in and connected to the Carbtune



  2. #2

    Default

    This is how the first 4 throttle bodies are adjusted. From left to right it is cylinders 4,3,2,1




    According to the BMW service manual the TB should be adjusted to 300mbar or 22.5cmHg so using a 7mm socket you tweak the adjusters to even out the readings. Turn left to reduce, turn right to increase.



    Plugs on cylinders 5 & 6 removed and put onto 1 & 2, lines from the carbtune plumbed in



    So using cylinders 3 & 4 for reference we adjust 5 & 6. From left to right 4,3,6,5



    After adjustment. The car does idle better and when I checked the tach the needle used to sit at 1000rpm, now it sits a bit below it.


Similar Threads

  1. Hey V8-ers - M5 throttle bodies on ebay
    By Robin-535im in forum 5 Series BMW
    Replies: 2
    Last Post: 05-24-2007, 05:08 PM
  2. Wicked Bodies
    By TheDuke in forum 5 Series BMW
    Replies: 1
    Last Post: 04-11-2005, 05:45 PM
  3. Re-Bores and Throttle bodies
    By Richy325i in forum 3 Series BMW
    Replies: 4
    Last Post: 10-24-2004, 11:07 AM
  4. M30 535i bored throttle bodies
    By Bruno in forum 5 Series BMW
    Replies: 0
    Last Post: 06-03-2004, 07:21 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •