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Accelerator mechanism > < Checking delivery rate

Golf Mk4

Checking non-return valve for fuel pump
Checking non-return valve for fuel pump
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.
Test procedure
  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 shut-off valve of K-Jetronic pressure tester -V.A.G 1318- (lever across direction of flow, -position B-).
–  Operate remote control for V.A.G 1348 -V.A.G 1348/3A- at short intervals, until a pressure of approx. 3 bar has built up.
  WARNING
Danger of spray when opening the shut-off tap. Hold container in front of free connection of the pressure gauge.
–  If pressure builds up too high, relieve excess pressure by carefully opening shut-off tap.
–  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:
–  Renew fuel delivery unit → Chapter.
  N20-0470

Accelerator mechanism > < Checking delivery rate