G - fuel consumption check

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G - FUEL CONSUMPTION CHECK

1108

• Remove the throttle case cover (see PROCEDURE OP. 1056A30).

899

1108

1. Position the fuel pressure test equipment.

Note: the fuel pressure test equipment is provided with adapters for the connection of different types of injection systems; before connecting fit the appropriate adapters on the equipment.

2. Disconnect the fuel delivery pipe from the injector holder pillar and connect it to pipe A.
3. Disconnect the pump fuel return pipe from the injector holder pillar and connect it to pipe B.
4. Plug the coupling of the fuel outlet from the injector holder pillar with the special plug.

• Connect pipe C of the fuel pressure test equipment to the fuel inlet coupling of the injector holder pillar.
• Set micrometric valve H and taps D and E in opening position.
• Set micrometric valve G and tap F in closing position.
• Connect the diagnostics equipment and start the fuel electric pump as indicated by the "Active diagnostics" program then by means of micrometric valve H roughly set the supply pressure at a value of approx. 0.9 bar.
• Switch off and disconnect the diagnostics equipment.
• Start up the engine and keeping it idling open tap F, then by means of micrometric valves G and H, set the supply pressure at a value of 1.1 ± 0.2 bar.
• Lock micrometric valves G and H through lock nuts I.

5. Set up the Flowtronic consumption verification equipment between pipe C and the coupling for fuel inlet to the injector holder pillar .

• Test fuel consumption on the road in accordance with standard 93/116/EC (litres x 100 km):
  IN TOWN TEST - includes a cold start, followed by the simulation of a varied urban route.
  OUT OF TOWN TEST - includes frequent accelerations, in all gears, simulating a normal out-of-town use of the vehicle;
  AVERAGE COMBINED TEST - includes 37 % of the town test and 63% of the out-of-town test.

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