Quote:
Originally Posted by rb0135
Ok.. Thanks for all the info. 
I think since the EGR showed differences, I'll start there (being the cheapest to get some carb cleaner and clean it). i will move onto the MAF after that.. better do one thing at a time, or I will never discover what fixed the issue (if I ever get it fixed).
Rob |
Rob,
We get here quite a few X5s and X3s 3.0D with same symptons as yours,even under warranty!Only difference is ,they come in with EML on and after we perform diagnostics,90% of the time its the EGR solenoid that brings up the error.First test we do(yes..you guessed it
),is disconnect the vac pipe.Then we replace solenoid..problem solved!
Cleaning the EGR valve wont do any harm but thats not the problem,because you have proved that with vac pipe disconnected ,the car is fine.With the pipe disconnected ,the egr is closed (no exhaust gases to inlet !) and although it may not be sealing 100%,its seems to be shut enough for it not have an influence in the cars performance.
What opens/closes the EGR valve is the ECU from instruction from EGR solenoid,so this would be be your first suspect