2427628 - X01 EXCESSIVE FUEL CONSUMPTION

The engine appears to running smoothly, but the fuel consumption is higher than previously recorded during the life of the vehicle.

The consumption data in the vehicle technical documentation has been defined during the course of homologation tests in accordance with directive 93/116/CE. These tests simulate an urban cycle and an 'average' extra-urban cycle and therefore may not be indicative as consumption depends very much on the style of driving.

When the engine fuel system selector is set at METHANE, the range is less than it should be

		Results of the tests
0	PRELIMINARY CHECKS	All OK	Problems met	Operation
	Check the condition of the air filterCheck the state of the spark plugs	Continue to Step 1	Filter element dirty or damaged	Replace the filter element ( Op.   1048A14  )
			Spark plugs dirty or damaged	Replace the spark plugs ( Op.   5510D10  )
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socketCheck that there are no faults in the engine management control unit	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT )
2	CHECK ON INJECTORS	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 3	Injector connections faulty	Restore the connection of the injectors with the control unit, ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT )
			Injectors faulty	Replace the injector ( Op.   1056B70  )
3	CHECK ON FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure ( Op.   0510C10  )	Continue to Step 4	Pressure not correct (too high a pressure is indicative of excessive consumption)	Replace the fuel pump assembly ( Op.   1040A70  )
4	CHECKING AIR CIRCUIT	All OK	Problems met	Operation
	Check the condition and seal of the air supply circuit	Continue to Step 5	Circuit component damaged	Replace the component
5	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'