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Testing fuel pressure regulator and holding pressure - engines with identification characters AEH, AKL > < Testing jet formation and tightness

Octavia Mk1

Testing injection rate
Testing injection rate
Special tools and workshop equipment required
t  Remote control -V.A.G 1348/3 A-
t  Auxiliary cable -V.A.G 1348/3-2-
t  Measuring tool set -V.A.G 1594 A-
t  Measuring glasses, e.g. -V.A.G 1602-
Test conditions
l  Fuel pressure o.k., test:
t  Engines with identification characters AEH, AKL → Chapter.
t  Engines with identification characters AVU, BFQ → Chapter.
l  Injection valves installed in the fuel distributor and fuel lines connected.
  Note
When testing the injection rate also check the jet formation. The jet must be the same for all valves.
–  Insert injector to be tested in a measuring glass.
   
–  Connect one contact of injector to the earth (battery negative terminal).
–  Connect the other contact of the injector to the remote control.
–  Connect terminal to battery positive terminal.
  S24-0579
–  Connect battery positive terminal and fuse socket No. 28 with adapter cable and adapter -V.A.G 1348/3-2-.
The fuel pump must run.
–  Actuate the remote control for 30 seconds.
–  Perform the measurement on all injectors.
Always use a new measuring glass to measure each individual valve.
–  Once all four injectors have been driven, position the graduated measuring glasses on an even base.
   Specified value per injection valve: 87...95 ml
–  If the measured value of one or more injection valves is outside the specified tolerance, switch off the fuel pump and replace the defective valve (or defective valves).
When installing the injection valves, pay attention to the following points:
t  Replace the O-rings on all the removed injection valves and moisten lightly with clean engine oil.
t  Insert injectors vertically and into the correct position in the fuel rail and secure with retaining clips.
t  Fit fuel rail with secured injectors onto the cylinder head and screw on uniformly.
  S20-0182

Testing fuel pressure regulator and holding pressure - engines with identification characters AEH, AKL > < Testing jet formation and tightness