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Checking lambda control > < Test air mass meter - valid 08.97 ?

Octavia Mk1

Testing the intake system for tightness (unmetered air)
Testing the intake system for tightness (unmetered air)
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3-
t  Engine leak search spray -G001 800 A1-
Test sequence
  Note
t  Because of the vacuum in the intake system the leak search spray is sucked in with the unmetered air. The leak search spray reduces the ignition performance of the mixture. This results in a drop in engine speed and a change in the lambda probe value.
t  You must comply with the safety instructions on the box.
–  Connect vehicle system tester -V.A.G 1552- and select engine electronics (address 01) → Chapter; engine runs in idle.
   
Readout on display:
–  Enter 08 for the function “Read measured value block” and confirm entry with the Q.
  
Vehicle system test                 HELP
Select function XX
Readout on display:
–  Enter 009 for the “display group number 9” and confirm entry with the Q key.
  
Read measured value block       HELP
Enter display group number      XXX
Readout on display, e.g.: (1 to 4 = display fields)
–  Note speed in display field 1.
–  Note lambda probe voltage in display field 3 and observe the range, in which it fluctuates.
–  Systematically spray parts of the intake system with engine leak search spray.
If the engine speed or lambda probe voltage does not change:
–  Press → key.
–  Enter 06 for the function “End output” and confirm the entry with key Q.
If the engine speed drops or if the lambda probe voltage changes:
–  Press → key.
–  Enter 06 for the function “End output” and confirm the entry with key Q.
–  Check the sprayed location of the intake system for leaks and eliminate the fault.
  
Reading measured value block 9        ->
1          2             3             4

Checking lambda control > < Test air mass meter - valid 08.97 ?