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Adjusting commencement of injection > < Checking fuel system for leaks

A4 Mk1

Dynamically checking and adjusting commencement of injection
Dynamically checking and adjusting commencement of injection
Special tools and workshop equipment required
   
t  -T10023- Insert tool
t  Fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3-
  W00-0986
t  -V.A.G 1331- Torque wrench (5...50 Nm)
  Note
The commencement of injection must always be checked after renewing the toothed belt or loosening the injection pump bolts or toothed belt sprockets, and adjusted if necessary.
–  Start engine.
–  Read measured value block, Display group 07, engine running at idling speed.
–  Check readout in display zone 4 (coolant temperature).
t  Specification: at least 85 °C
Do not continue the test until the coolant has reached the specified temperature.
–  Start basic setting function, Display group 04, engine running at idling speed.
–  Check display in display zone 4.
t  Specification: 100%
–  Observe display in display zone 2.
t  Specification: “retarded”
–  Check display in display zone 3.
t  Specification: 2° ATDC ± 2°
If the readout does not match the specification, adjust the commencement of injection (injection timing) → Chapter.
  W00-0427

Adjusting commencement of injection > < Checking fuel system for leaks