volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Activated charcoal filter system > < Checking delivery rate

Golf Mk4

Checking fuel pump non-return valve
Checking fuel pump non-return valve
Test prerequisites
l  Remote control for V.A.G 1348 -V.A.G 1348/3A- is still connected.
l  K-Jetronic pressure tester -V.A.G 1318- is still connected.
  Note
At the same time, this test checks for leaks in the fuel supply line connections from the fuel delivery unit to the point at which the K-Jetronic pressure tester -V.A.G 1318- is connected.
   
–  Close shutoff valve of K-Jetronic pressure tester -V.A.G 1318- (lever across direction of flow, position -B-).
–  Operate remote control at short intervals until a pressure of approx. 3 bar has built up.
  WARNING
Danger of spray when opening shutoff valve. Hold container in front of free connection of K-Jetronic pressure tester -V.A.G 1318-.
–  If pressure builds up too high, relieve excess pressure by carefully opening shutoff valve.
–  Watch pressure drop on pressure gauge. After 10 minutes, pressure must not drop below 2,5 bar.
If the pressure drops further:
–  Check line connections for leaks.
If no fault in lines is detected:
–  Fuel pump -G23- defective, renew fuel delivery unit → Chapter.
  N20-0109

Activated charcoal filter system > < Checking delivery rate