Volumetric Efficiency

Dears,

I have been diagnosing BMW E70 2007 3.0 si. I need to know if this engine has good efficiency or not.

Here are some data for this purpose

WOT with vehicle stopped.

Calculated Load Value Max 82% Min 2.4
Absolute Load Value Max 48.6% Min 12.5
Airflow rate from MAF 35.65 g/s
Lambda Bank1 sensor1 0.85
Lambda Bank2 sensor1 0.84



for my understanding, this car has partially plugged exhaust coz calculated load isnt high enough to be over 85% and absolute load (intake pressure) is some what high 48.6% and maf is low. The engine is rich.


Is my diagnosis right?


Thanks for any clarification or comments

What is maf reading at warm idle?

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Preferably do a road test. With the car not moving there might be rev limiting taking place, the throttle plate not opening complety etc....

Drive the vehicle while recording the related pids with a scan tool and afterwards input the collected data into a VE calculator - done!

Agree with Juergen, you'll need to go on a test drive to see the readings you want. A throttle snap while stopped won't cut it.