X01 EXCESSIVE FUEL CONSUMPTION - Fiat - MULTIPLA - eLearn

2888493 - X01 EXCESSIVE FUEL CONSUMPTION

The engine seems to be working normally, but the fuel consumption is higher than ever before for the vehicle.

The fuel consumption figures in the technical documentation for the vehicle have been defined during the course of homologation tests in accordance with directive 93/116/CE. These tests simulate an urban route and an "average" extra-urban route and therefore they may not be indicative because fuel consumption depends greatly on the style of driving.

1	CHECK FOR LEAKS	All OK	Problems encountered	Operation
		Results of the tests
	Check visually for any fuel leaks from: tank, fuel filler, multifunction valve, etc.	Move on to Step 2 1	Leaks detected	Eliminate leaks and/or replace defective components (see Assembly 1040A)
2	FUEL FILTER CHECK	All OK	Problems encountered	Operation
	Check fuel filter operation	Move on to Step 3 1	Presence of water, petrol, paraffin or dirt detected	Clean tank pipes and replace filter element Op. 1044B20
3	AIR CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the following, in order: the condition of the air filter the condition and seal of the air supply circuit	Move on to Step 4 1	Filter dirty or partly blocked	Replace the air filter Op. 1048A14
		Move on to Step 4 1	Circuit component damaged	Replace component (see Assembly 1048A)
4	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic test equipment (Examiner or other instruments) to the diagnostic socket. Check: that there are no faults in the engine management control unit the plausibility of all the parameters	Move on to Step 5 1	Error detected in the control unit	Continue following the instructions for the diagnostic equipment
		Move on to Step 5 1	No communication with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5050 GESTIONE ELETTRONICA MOTORI DIESEL
5	EXHAUST PIPE CHECK	All OK	Problems encountered	Operation
	Check for any obstructions in the exhaust pipe	Move on to Step 6 1	Exhaust pipe blocked	Replace the component involved (see Assembly 1076B)
6	VALVE CLEARANCE CHECK	All OK	Problems encountered	Operation
	Check correct valve tappet clearance Op. 1036H14	Move on to Step 7 1	Clearance not correct	Restore correct clearance for valves Op. 1036H18
7	TIMING CHECK	All OK	Problems encountered	Operation
	Check correct engine timing.	Move on to Step 8 1	Timing not correct	Restore the correct timing for the engine Op. 1032B14
8	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out cylinder compression test Op. 0510A10	Move on to Step 9 1	Compression values not correct	Restore the correct cylinder compression, checking, for example, the seal for the injectors Op. 1056B70 and possibly for the cylinders.)
9	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting with another symptom