Checking Mass Air Flow When Under Partial Load

Checking Mass Air Flow When Under Partial Load












^ Turn the Ignition switch to the OFF position.

Plug in the connector:
EVAP canister purge valve
^ Drive the car in top gear with a steady high engine load.
^ Driving uphill is recommended.
^ Read value: Airmass Deviation from Calculated (Trionic).







^ State what the diagnostic tool shows:

15% to 25% - Checking Air Leakage Before Flap

Other value - Checking the Fuel Supply