Check The Suction Jet Pump; Removing And Installing Suction Jet Pump - Skoda Octavia III 2013 Workshop Manual

2.15

Check the suction jet pump

The fuel tank consists of a left and right chamber. In order to pump
the fuel out of the left chamber -3- of the fuel tank into the right
chamber to the housing of the fuel delivery unit -2-, a suction jet
pump -1- is required.
Function of the suction jet pump
Suction jet pump functions according to a basic physical principle:
Drive jet from the electric fuel pump is pushed through the nozzle
in the suction jet pump and is thus accelerating. This acceleration
causes the take-up of the surrounding fuel and the latching to the
delivery chamber of the fuel delivery unit.
Fault caused by faulty ejector pump
Caution
Vehicle breakdown due to faulty suction jet pump.
In the event of a fault to the suction jet pump, the vehicle may
brake down due to a lack of fuel even if the fuel tank is up to
1
/ 4 full.
If the suction jet pump fails to work, up to 15 l of fuel (up to approx.
1
/ 4 content of the tank) will remain in the left-hand area of the fuel
tank from where the fuel delivery unit is not draw fuel.
If the vehicle remains broken down due to a lack of fuel with a fuel
1
tank up to approx. / 4 full, proceed as follows:
– Check the fuel pump with
hicle diagnostic tester
When the fuel pump is OK and the fuel is not drawn in:
– Add around 5 litres of fuel.
– Start engine.
if the engine starts up:
– Replace the suction jet pump
⇒ "2.16 Removing and installing suction jet pump",
page 265 .
2.16 Removing and installing suction jet
pump
Special tools and workshop equipment required
♦ Disassembly wedge - 3409-
♦ Wrench for union nut - T30101 (3087)-
•
The fuel tank must not be more than
1.6/66; 77; 81; 2.0/105; 110; 135 kW TDI CR engine - Edition 07.2014
Targeted fault finding
1
/ 3 full.
Octavia III 2013 ➤ , Octavia III 2014 ➤
⇒ Ve‐
2. Removing and installing parts of the fuel supply system
265