on September 5, 2015, 2:31 pm, in reply to "Re: BMW X3 2.0 - white acrid smoke, no throttle response"
>>>>Actual values at idle show air mass nominal 270 with actual at 500 <<<<
I have come across this discrepancy before on an X3, even on a 'good ' one, no idea why but target and measured only tally when EGR is active
This is 'good' data
Eng speed -actual MAF-target MAF--------EGR duty
830---------550-570 mg ---- 272 mg----------5
830---------274-284-------- 276-------------65
Aidan