Fuel Pump Delivery Volume, Checking

WARNING!
Fire hazard. DO NOT smoke or work near heaters of have anything in the area that can ignite fuel.







- VAG1348/3 A with VAG1348/3-2
- VAG1318/10
- VAG1318/14
- Measuring container (fuel- resistant)

Requirements for test:
- Battery voltage not less than 12 V
- Fuel filter OK
- Ignition switched off

Test sequence
- Remove floor matt at front of passenger's footwell.







- Unscrew knurled nut -1-.
- Remove trim -2- (-3- not installed)







- Remove fuse No. S1 from fuse holder ST4 in fuse box.
ST4 - blue fuse holder







- Connect VAG1348/3A remote control with VAG1348/3-2 adapter cable to lower terminal of socket for fuse No. S1 in fuse carrier ST4 -arrow 1-.
- Connect clamp to battery (B+) supply (e.g. socket of 60 A fuse -arrow 2- at top of fuse box).
- Remove engine cover panel.







- Disconnect fuel return hose at fuel pressure regulator.


WARNING!
- Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
- Fire hazard. DO NOT smoke or work near heaters of have anything in the area that can ignite fuel


- Connect test hose -arrow- and hold end of hose in measuring container.
- Operate remote control for 15 seconds (keep button pressed).







- Compare the quantity of fuel delivered with specification.

*) Minimum delivery cm3/15 seconds
**) Voltage at fuel pump with engine stationary and pump running (approx. 2 volts less than battery voltage).

- Attach return hose and secure with new hose clamp.