Volkswagen Golf Service & Repair Manual: Removing and installing suction-jet pump
On vehicles with four-wheel drive the fuel tank is divided
into a left and a right chamber. A suction-jet pump
-2- is used for delivering fuel
from the left fuel tank chamber to the baffle housing of the
fuel delivery unit -1- on the
right. |
Function of suction-jet pump |
The suction-jet pump operates according to the principle of
fluid entrainment: the stream of fuel from the electrical fuel
pump is passed through a nozzle in the suction-jet pump, and is
thus accelerated. The accelerated stream of fuel draws off the
surrounding fuel and delivers it to the baffle housing of the
fuel delivery unit. |
Faults caused by defective suction-jet pump |
Note
Risk of breakdown due to defective suction-jet pump. |
If the suction-jet pump is defective, the engine can stop
due to fuel starvation when the tank is still
1/4
full. |
If the suction-jet pump does not work, approx. 15 litres of
fuel (1/4
of tank capacity) remain in the left chamber of the fuel tank
and cannot be extracted by the fuel delivery unit. |
If the engine stops due to fuel starvation with the tank
filled up to about 1/4,
proceed as follows: |
– |
Check fuel pump with → Vehicle
diagnostic tester. |
If fuel pump is OK, but no fuel is delivered: |
– |
Refill fuel tank with approx. 5 litres of fuel. |
– |
The suction-jet pump cannot be renewed individually. Renew
fuel tank
→ Chapter. |
|
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Special tools and workshop equipment
required
Removal wedge -3409-
Procedure:
...
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