Skoda OCTAVIA MK1 Service Manual page 203

Test condition
l Fuel pressure o.k., test
– Detach vacuum hose from fuel pressure regulator.
– Detach the fuel feed line and return line on the quick-release fittings.
WARNING
The fuel system is under pressure!
Detach the hose which connects the solenoid valve for the activated charcoal filter with
– the throttle valve control unit on the valve as well as on the control unit and unhook it at
the intake manifold.
Disconnect the plug from the valve for intake manifold changeover and from the hall
–
sender.
– Disconnect the spark plug connectors for cylinders two and three.
Unscrew the fuel distributor from the intake manifold and remove it carefully with the
–
injection valves from the intake manifold.
– Unclip cable harness from the cable guide and remove.
Carefully pull out the fuel distributor with injection valves, fuel feed line and return line and
–
ACF hose towards the right (from the ACF reservoir) from below the intake manifold and fit
again the fuel feed line and return line (blue marking).
– Insert injector to be tested in a measuring glass, e.g. -V.A.G 1602-.
Lay a contact of the injection valve with
– the test cable and alligator clip from the
adapter cable set -V.A.G 1594 A- on the
engine mass.
Connect the other contact of the injection
– valve with remote control -V.A.G 1348/3 A
-, adapter cable -V.A.G 1348/3-2- and
auxiliary cable to battery positive.
Initiate an actuator diagnosis and select
– the activated charcoal filter solenoid
valve 1 -N80- →
runs for approx. 50 s.
Test the tightness of the injectors (visual
– inspection). With the fuel pump running
per valve only 1...2 drops (50 s) of fuel
may escape.
If the fuel loss is greater adjust the fuel
–
pump (end final control diagnosis) and
replace defective injector.
→ Chapter.
Chapter. The fuel pump
203