D02 ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER) - Fiat - STILO - eLearn

3360205 - D02 ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER)

Under conditions of constant load and speed, there are intermittent decreases in performance, even prolonged

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check: the condition of the air filter; the condition of the air intake circuit	Continue to Step 1	Blocked filter	Replace the filter element Op. 1048A14
		Continue to Step 1	Blocked filter	Eliminate the problem
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Verify: that there are no faults in the engine management control unit the plausibiilty of the parameters	Continue to Step 2	'Fuel system' error appears	See table Z50 MIXTURE STRENGTH ERROR
			'Misfiring' error appears	See table Z53 MISFIRE ERROR
			Incoherent parameter	Continue following the instructions for the diagnostic equipment
			Incoherent parameter	Continue following the instructions for the diagnostic equipment
2	ROAD TEST WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Road test the vehicle, reproducing the conditions in which the fault arises, keeping the diagnostic equipment connected. Verify: that there are no faults in the engine management control unit the plausibiilty of the parameters	Continue to Step 3	'Fuel system' error appears	See table Z50 MIXTURE STRENGTH ERROR
			Incoherent parameters	See table Z53 MISFIRE ERROR
			Incoherent parameters	Continue following the instructions for the diagnostic equipment
			Incoherent parameters	Continue following the instructions for the diagnostic equipment
3	FUEL PRESSURE ROAD TEST	All OK	Problems met	Operation
	Road test the vehicle and check the fuel supply pressure in the conditions that lead to the anomaly Op. 0510C10	Continue to Step 4	Insufficient fuel presure: pipes obstructed	Remove the blockages and replace the pipes if necessary
		Continue to Step 4	Insufficient fuel pump: pump faulty	Replace the fuel pump assembly Op. 1040A70
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists: control unit defective	Replace control unit Op. 1056B82 Search for the fault starting from another symptom'