X01 EXCESSIVE FUEL CONSUMPTION - Alfa - 156 - eLearn

3233208 - X01 EXCESSIVE FUEL CONSUMPTION

The engine appears to run 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 the directive in force. 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
	Verify: Whether there is service information on the subject The condition of the air filter; Check the exhaust circuit, paying special attention to any obstructions in the pipes	Continue to Step 1	Filter element dirty or damaged	Replace the filter element Op. 1048A14
			Exhausts obstructed	Replace the complete exhaust pipe Op. 1076B12
			Exhaust silencers blocked	Replace the silencers
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the engine management control unit: in errors ambient that there are no faults; in parameters ambient the plausibility of all the parameters, in particular: engine temperature ignition advances/poss. reduction for detonation injection times air mass fuel consumption.	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
		Continue to Step 2	Implausible parameters	Continue following the instructions for the diagnostic equipment, analyzing the causes that have led to the implausibility
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the Examiner diagnostic equipment, check that the upstream and downstream Lambda sensors are working properly	Continue to Step 3	Irregular operation	Replace the defective Lambda sensor
3	PHASE TRANSFORMER CHECK IN ACTIVE DIAGNOSIS	All OK	Problems met	Operation
	Check the operation of the phase transformer in active diagnosis	Continue to Step 4	Not working	Using a voltmeter (graphic is best) check the transformer operating signal and, if necessary, replace the transformer
4	CHECKING TIMING	All OK	Problems met	Operation
	Check that the valve gear timing is correct	Continue to Step 5	Timing not correct	Restore the correct timing Op. 1032B14
5	MODULAR MANIFOLD CHECK IN ACTIVE DIAGNOSIS	All OK	Problems met	Operation
	Check the operation of the modular manifold in active diagnosis	Continue to Step 6	Not working	Using a voltmeter (graphic is best) check the modular manifold operating signal and, if necessary, replace the modular manifold solenoid valve
6	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis