2010 DOHC engine vibration
The current update:
Originally Posted by roger 04 rt
Replaced all throttle cables and measured slack on both sides (.5-1.0mm). Also ensured TBs' butterflys hit stops same time using a balance tube with steppers disconnected with Lambda sensors connected. balance of right vrs left, one higher.
Disconnected the Lambda Sensors and the battery (30 mins+) to delete last mapping from memory. This way mapping returns to default mapping and a richer fuel/air mixture. Connected GS911 and re-sync TBS according to procedure (locking out Steppers) and using a Motion Pro SynchPRO Carb Tuner to balance TBs. Minimal correction on right cable to bring TBs straight across measurement on both sides. Vibration still there but minimized and moved to lower RPM, approx. 33-35K through the rest of the range. Very smooth idle until you throttle up to the 33k range then vibration returns. Shut down the bike using GS 911 procedure (waiting for the Steppers to come back on). Restarted bike (Lambda sensors still disconnected) idles smooth but vibration (diminished) still thereat 33k RPM.
Shut the bike down and re-connected the Lambda sensors and started bike. Waited for temp to rise and Lambda sensors kicked in and engine vibration introduced immediately at a slightly higher RPM 43-45K RPM and up through the rest of the RPM range.
My conclusion was the Lambda sensors were introducing something into the mapping and I took the bike to the dealer to have them check on Oscilloscope. Result: all good. I am picking up bike and file of the test/scope today. I will send you the file if you would like to see it?
Another way to look at this lambda sensor test is that they may be masking another problem because with the default mapping on the vibration is still there.
Open to suggestions. I have been working on this problem since April 2012.
O2 Sensors for 2010 R1200GS (Camhead)
Are you sure that these O2 sensors will work on the 2010 R1200GS (Camhead)? The stock (OEM) ones are made by NTK for BMW. NTK/NGK do not make an aftermarket O2 Sensor for the OEM O2 Sensor. Is the voltage the same?
Originally Posted by roger 04 rt
Latest Update to Cam head engine vibration problem
Just another update in the Cam Head Sage of Engine vibration:
Originally Posted by strmboui05
First I want to say thanks to all of you for your support, ideas and suggestions. Just wanted you all to know I appreciate your time in effort to solve this BMW problem. Thanks! rac
Pulled the the valve covers and checked all valves. Each valve right in tolerance, couldn't go up or down (.05mm) on any valve to get closer to middle range. Did another re-sync of TBs with GS911 and Motion Pro SynchPRO Carb Tuner and got the vibration to move to start around 43-45K and up through the RPM range. This was at the idle range 0f 1100-1800 rpm range.
I am completely stumped! Taking the bike to different dealer here in Colorado and see if they can break the code! I will give you a complete report after diagnosis and fix!
When were your plugs chsnged last... I just changed all 4 on my 2012, and it made a big difference in the smoothness of the engine... both at idle and running...
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I changed all when I did the last TB-Sync, no change.
Originally Posted by jeffkyle