VW Golf manuals

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.
–  Start engine.
If engine starts OK now:
–  The suction-jet pump cannot be renewed individually. Renew fuel tank → Chapter.
 

Removing and installing suction-jet pump

Removing and installing fuel pump control unit -J538-
Special tools and workshop equipment required     Removal wedge -3409- Procedure: ...

Running gear, axles, steering
...

Other materials:

Checking radial and lateral runout of wheels and tyres, tolerances
Radial and lateral run-out occur when the wheel and tyre do not run absolutely true. For technical reasons, 100% true running is not possible. Therefore, the manufacturers of these components allow a precisely determined ...

Assembly overview - rear door window
1 -  Rear door 2 -  Window regulator Removing and installing → Chapter 3 -  Spreader pin Together with spreader plug for securing door window. 4 -  Spreader plug ...

Assembly overview - suspension strut, shock absorber, spring, torsion beam axle
1 -  Bolt Renew after removing 50 Nm +45° 2 -  Shock absorber Removing and installing → Chapter Defective shock absorbers must always be degassed and drai ...

© 2016-2020 Copyright www.vwgolf.org