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Display group 004 at idling speed (engine warm, coolant temperature not below 80 °C) > < Evaluation: Air mass drawn in (specified) display

Golf Mk4

Evaluation: Air mass drawn in (actual) display
   
Evaluation: Air mass drawn in (actual) display
Display fault reader -V.A.G 1551-Possible fault causeFault elimination
Below 230 mg/H
t  Excessive exhaust gas recirculation
–  Checking exhaust gas recirculation → 4-cyl. diesel engine, mechanical system; Rep. Gr.26
 
t  Unmetered air
–  Check intake air system for leaks.
Above 370 mg/stroke
t  Engine too cold
–  Run engine at increased speed to warm up and repeat check.
 
t  Insufficient exhaust gas recirculation
–  Engine running at idling speed for more than 2 mins., give brief burst on throttle.
 
t  Defective air mass meter -G70-
–  Check air mass meter -G70- → Chapter
–  If a fault is present the measured value block indicates a constant air mass value of approx. 550 mg/H over the complete speed and load range.

   

Display group 004 at idling speed (engine warm, coolant temperature not below 80 °C) > < Evaluation: Air mass drawn in (specified) display