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Checking fuel pressure regulating valveN276 > < Installing high-pressure lines

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Fuel low pressure line: check
Fuel low pressure line: check
Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.
Special tools and workshop equipment required
   
t  Pressure gauge K-Jetronic -V.A.G 1318-, see equivalent → Anchor
Test requirements
l  Battery voltage at least 12.5 V.
l  Fuel filter OK.
l  Fuel tank: full, at least half full.
l  Ignition switched off
  W00-0577
Checking residual pressure
–  Disconnect the engine cover-arrow-.
  WARNING
t  Always read rules for cleanliness and instructions for working on fuel system → Chapter.
t  Follow these instructions and rules for cleanliness before starting work and while working on the fuel system.
t  Prior to opening the fuel system, place a clean cloth around the joint and carefully loosen this to reduce the pressure.
  E10-10060
–  Pull fuel supply line -arrow- from the connecting point.
  A23-10331
–  Connect K-Jetronic pressure tester -V.A.G 1318- with the matching adapter -2- to fuel supply line -1-. Connect the other adapter -4- of the K-Jetronic pressure tester -V.A.G 1318- to fuel supply line -3-.
  Note
  A23-10332
In this way the K-Jetronic pressure tester -V.A.G 1318- is connected into the fuel supply line.
–  Connect a diagnosis tester.
–  Switch on the ignition.
–  Select „Engine electronics“ in vehicle self-diagnosis.
–  Then select „Basic setting“.
–  Select „Checking fuel system pressurisation pump“ from the list.
–  Press „Start“ button
–  Fuel pumps will run for approx. 60 seconds.
–  Keep the fuel pumps running until the maximum fuel pressure has been reached.
l  Specification: min. 3.5 bar
If specification is not obtained:
Check union between pressure tester and fuel line for leaks.
Check pressure tester for leaks.
Check fuel lines and their connections for leaks.
Fuel filter is blocked.
  Note
Check fuel system for leaks.
  A23-10333

Checking fuel pressure regulating valveN276 > < Installing high-pressure lines