volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Checking supplementary fuel pumpV393 or fuel pump 2V277 (inline EFP), engine codes CFFA, CFFB, CFGB, CFHB, CFHC, CLCA > < Checking delivery rate of fuel supply pumpG6, engine codes CAYB, CAYC

Golf Mk6

Checking supplementary fuel pumpV393 or fuel pump 2V277 (inline EFP), engine codes CBAA, CBAB, CBBB, CBDA, CBDB, CBDC, CJAA
Checking supplementary fuel pump -V393- or fuel pump 2 -V277- (inline EFP), engine codes CBAA, CBAB, CBBB, CBDA, CBDB, CBDC, CJAA
  Note
The component designation for the inline EFP was changed from „supplementary pump V393“ to „fuel pump 2 V277“ in a software revision. This is the same component.
Special tools and workshop equipment required
   
t  K-Jetronic pressure tester -V.A.G 1318-
Test prerequisites
l  Battery voltage at least 12.5 V
l  Fuel filter OK.
l  Fuel tank: level min »reserve«.
l  Ignition switched off.
–  Remove engine cover → Rep. gr.10.
  WARNING
t  Always read rules for cleanliness and instructions for working on fuel system → Chapter.
t  Always follow these rules for cleanliness and instructions before starting work and while working on the fuel system.
t  Wrap a clean cloth around the connection before opening the fuel system. Then release pressure by carefully pulling hose off connection.
  W00-0577
–  Pull fuel supply line -arrow- off high-pressure pump.
  A23-10321
–  Connect K-Jetronic pressure tester -V.A.G 1318- with suitable adapter -2- to fuel supply line -1-. Connect other adapter -3- from K-Jetronic pressure tester -V.A.G 1318- to open connection on high-pressure pump.
  Note
  A23-10324
The K-Jetronic pressure tester -V.A.G 1318- must be inserted as an intermediate element into the fuel supply line.
–  Connect diagnosis tester and perform the guided function „Checking electric fuel pump(s)“.
  Note
The fuel pump is now activated for 30 seconds.
–  Run fuel pumps until highest fuel pressure has built up.
l  Specification: at least 3.5 bar
If the specification is not attained:
Check union between pressure gauge and fuel line for leaks.
Test pressure gauge for leaks.
Check fuel lines and their connections for leaks.
Check whether fuel filter is blocked.
Check fuel delivery rate of fuel system pressurisation pump -G6- → Chapter.
  Note
Check fuel system for leaks.
  A23-10323

Checking supplementary fuel pumpV393 or fuel pump 2V277 (inline EFP), engine codes CFFA, CFFB, CFGB, CFHB, CFHC, CLCA > < Checking delivery rate of fuel supply pumpG6, engine codes CAYB, CAYC