Skoda Octavia III 2013 Workshop Manual page 353

Work procedure
Note
Safety precautions when working on the fuel supply system
♦
⇒ "2 Safety instructions", page 3
Observe rules for cleanliness
♦
⇒ "3.1 Rules of cleanliness", page 6
– Remove engine cover
⇒ "1.1 Removing and installing engine trim panel", page 10
– Loosen hose clamp -arrow-, remove fuel return-flow hose from
the fuel distributor.
– Close the return-flow line connection with a blind plug.
– Connect an auxiliary hose -3- to the fuel distributor return hose
-2-.
– Hold this hose line -3- in a suitable vessel in order to measure
the return flow quantity.
1) Test with engine running
– Start engine and run at idling speed.
• Specified value: greater than 75 ml in 30 seconds
If the specified value is not reached, the fuel pressure regulating
valve - N276- is defective.
2) Test with engine running
If the condition under point 1) is fulfilled, increase the engine
speed to ≥ 2000 rpm.
• Return flow quantity specified value: 0 ml
• A drop-leakage is permissible
If the specified value is not reached, the fuel pressure regulating
valve - N276- is defective.
3) The engine will no longer start
Perform test at starter speed.
• Return flow quantity specified value: 0 ml
• A drop-leakage is permissible
If the specified value is not reached, the fuel pressure regulating
valve - N276- is defective.
– Replace fuel pressure regulating valve - N276-
⇒ "4.5 Replace fuel pressure regulating valve N276 ",
page 346 .
1.6/66; 77; 81; 2.0/105; 110; 135 kW TDI CR engine - Edition 07.2014
.
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Octavia III 2013 ➤ , Octavia III 2014 ➤
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4. Senders and sensors
345