X01 EXCESSIVE FUEL CONSUMPTION - Alfa - 147 - eLearn

3022760 - 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.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check the conditions: of the air filter; of the fuel filter. Check the exhaust circuit, with particular attention to any blockages in the pipes	Continue to Step 1	Filter element dirty or damaged	Replace the filter element Op. 1048A14
			Fuel filter dirty	Replace the filter element Op. 1044B10
			Exhausts obstructed	Replace the complete exhaust pipe Op. 1076B12
			Exhaust system obstructed	Replace the defective system component
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the engine conntrol node: in error mode that there are no faults; in parameters ambient the plausibility of all the parameters.	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
2	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Check the fuel supply circuit, high pressure side: See Test 1060D Check high pressure fuel circuit	Continue to Step 4	Pressure not correct: pressure regulator faulty	Replace the pressure regulator Op. 1060E50
			Pressure not correct: injector manifold faulty	Replace the manifold Op. 1060F30
			Pressure not correct: injectors faulty	Replace the injectors Op. 1060F10
			Pressure not correct: pipe from pump to manifold faulty	Replace the pipe
			Pressure not correct: pipe from manifold to injectors faulty	Replace the pipe
3	LOW PRESSURE CHECK	All OK	Problems met	Operation
	Check the fuel supply circuit, low pressure side: See Test 1060A Low return fuel pressure circuit check See Test 1060B Low fuel pressure supply circuit check	Continue to Step 4	Pressure not correct: fuel filter faulty	Replace the fuel filter Op. 1048A10
			Pressure not correct: electric pump faulty	Replace the electric pump Op. 1040A70
			Pressure not correct: return manifold faulty	Replace the manifold Op. 1060F50
			Pressure not correct: fuel return pipes faulty	Replace the pipes concerned
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis