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Checking fuel delivery rate > < Checking fuel pressure

Polo Mk5

Checking holding pressure
Checking holding pressure
Test prerequisite
l  Fuel pressure OK and pressure tester -V.A.G 1318- connected.
Test procedure
–  Remove fuse holder cover.
–  Remove fuse for fuel pump from fuse holder. Fuse assignment → Current flow diagrams, Electrical fault finding and Fitting locations
–  Connect remote control for V.A.G 1348 -V.A.G 1348/3A- with adapter cable -V.A.G 1348/3-2- to fuse socket and battery positive (+).
  WARNING
Fuel system is under pressure! Wear eye protection and protective clothing to avoid possible injury and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
   
–  Pull supply line -1- off output side of fuel filter.
  Note
Press in securing ring to release fuel line.
–  Connect pressure tester -V.A.G 1318- using connector -V.A.G 1318/23- and adapter set -V.A.G 1318/17- as shown.
–  Close pressure gauge shut-off tap (lever at right angles to through-flow direction, position -B-).
–  Operate remote control to V.A.G 1348 -V.A.G 1348/3A- for approx. 10 seconds to fill fuel filter and build-up a system pressure of 4 bar.
–  Watch pressure drop on pressure gauge. After 10 minutes, pressure must not drop below 3 bar.
If the pressure drops further:
–  Check line connections for leaks.
If no fault in lines is detected:
–  Renew fuel pressure regulator.
  N20-0532

Checking fuel delivery rate > < Checking fuel pressure