D03 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION) - Fiat - MULTIPLA - eLearn

2888334 - D03 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)

The engine does not run smoothly in all conditions (load, speed, etc.). In particular, it is irregular with short but frequent flat spots

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Results of the tests
	First, check: condition of the air filter status of spark plugs and leads wiring on engine correctly fastened to earth battery correctly fastened to earth; correct fastening of positive lead between battery and alternator	Move on to Step 1 1	Filter element dirty or damaged	Replace the filter element Op. Op. 1048A14 ELEMENTO FILTRANTE DEL FILTRO ARIA - SOST.
			Air filter not correctly fitted	Refit air filter correctly Op. Op. 1048A14 ELEMENTO FILTRANTE DEL FILTRO ARIA - SOST.
			Spark plugs dirty or damaged	Clean or replace the spark plugs Op. Op. 5510D10 CANDELE ACCENSIONE MOTORE - S.R.
			Spark plug leads damaged	Replace spark plug leads Op. Op. 5510D14 FASCIO CAVI CANDELE - S.R.
			Earth leads fastening not correct	Restore battery earth lead Op. Op. 5530B22 CAVO DI MASSA BATTERIA - S.R.
			Positive battery lead fastenings not correct	Restore the positive battery lead Op. Op. 5530B26 CAVO TRA BATTERIA E MOTORINO DI AVVIAMENTO - S.R.
1	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 2 1	Error detected in the control unit	Continue according to the diagnostic equipment instructions
		Move on to Step 2 1	No communication with the control unit	Restore connection between engine management control unit and diagnostic connector See Vedere E5030 GESTIONE ELETTRONICA MOTORI BENZINA
2	INJECTOR CHECK	All OK	Problems encountered	Operation
	With the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Move on to Step 3 1	Injector connection faulty	Repair the connection for the injectors with the control unit, See Vedere E5030 GESTIONE ELETTRONICA MOTORI BENZINA
		Move on to Step 3 1	Injectors faulty	Replace injectors Op. Op. 1056B70 ELETTROINIETTORE (UNO) - S.R. A TUBO COLLETTORE COMBUSTIBILE STACCATO - COMPRENDE LA SOST. DELLA GUARNIZIONE
3	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Check the fuel supply pressure Op. Op. 0510C10 IMPIANTO DI ALIMENTAZIONE CARBURANTE - VERIFICA PRESSIONE DI MANDATA	Move on to Step 4 1	Pressure not correct	Replace the fuel pump assembly Op. Op. 1040A70 COMPLESSIVO POMPA IMMERSA COMPLETA DI COMANDO INDICATORE DI LIVELLO - S.R.
4	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression test Op. Op. 0510A10 COMPRESSIONE CILINDRI - VERIFICA A CANDELE O INIETTORI STACCATI	Move on to Step 5 1	Compressor values not correct	Restore the correct cylinder compression, checking the injector seal in particular
5	CHECK ACCELERATOR	All OK	Problems encountered	Operation
	Check the accelerator cables, in particular, make sure of cable condition cable slides properly in sheath sheath correctly fastened	Move on to Step 6 1	Accelerator cable fault	Repair accelerator cable Op. Op. 1068A30 POTENZIOMETRO SU PEDALE ACCELERATORE - S.R.
6	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists