Skoda OCTAVIA 2004 Workshop Manual page 100

23
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Fuel Preparation/Fuel Injection
- If the fault moves with the injector, replace
the relevant injector.
- If the fault remains at the cylinder, test the
compression.
- If the compression is o.k., replace the rel-
evant delivery valve together with seal
⇒ page 23-4, Servicing injection pump.
Notes:
♦ Always use a soft object (plastic, wood) to
remove the seal from the pump otherwise
the sealing surface may be scratched.
♦ If the car has covered more than 15000 km,
always replace the set of delivery valves.
This engine is equipped with 2-spring injectors.
The quantity of fuel is injected in this case in 2
stages.
If there is any problem with these injectors, it is
only possible to replace them as it is neither
possible to set the pressure nor to repair the
injector.
K Test injectors with injector tester (e.g. V.A.G
1322) and pressure pipe V.A.G 1322/2.
Important!
When testing injectors, ensure that the fuel spray
does not strike your hands otherwise the fuel will
penetrate into the skin as a result of the high pres-
sure and may cause severe injuries.
l Pressure gauge switched on
- Slowly press the pump lever down. When
fuel ejection starts, read off the ejection pres-
sure. If the ejection pressure differs from the
specified pressure, replace the injector.
New injectors
Wear limit
Testing for leaks
l Pressure gauge switched on
- Slowly press the pump lever down and main-
tain the pressure at about 15 MPa for 10
seconds. During this time, no fuel should drip
out of the injector opening.
- If a leak exists, replace injector.
OCTAVIA
19...20 MPa
17 MPa
Edition 05.97
S00.5111.51.20