Skoda Octavia III 2013 Workshop Manual page 335

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
– Disconnect hose connection -2- at the fuel return-flow line.
– Close the return-flow line connection with a blind plug -1-.
– Keep fuel return-flow hose -2- (extend if necessary) in a meas‐
uring vessel to measure the overall return flow quantity.
– Start engine and run in idle for 2 minutes.
• Specified value in 2 minutes: 0 ml to 50 ml
– If the specified value is reached, increase engine rpm to 2000
to 2500 rpm for 2 minutes, then check the return flow quantity.
• Specified value in 2 minutes: less than 250 ml
If the specified value is exceeded, this indicates that there is one
(or more) defective fuel injection unit(s). Check the return flow
quantity of each individual injection unit
B - Check return quantity of the individual injection units
Special tools and workshop equipment required
♦ Hose clamps up to ∅ 25 mm - MP7-602 (3094)-
♦ Return flow quantity measuring device - VAS 6684-
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
Note
Each injection unit has a small fuel return-flow quantity. If this re‐
turn flow quantity is relatively great (in relation to the return flow
quantity of the other injection units), this injection unit is probably
defective.
– Before removing, clean all return flow connections (for exam‐
ple with a commercially available cold cleaner).
– Dry all cleaned parts.
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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2. Injection units/fuel distributor
327