D10 ENGINE IDLE IRREGULAR - Fiat - DUCATO - eLearn

244000455 - D10 ENGINE IDLE IRREGULAR

Engine idles unevenly. In particular, level is not consistent and regular when load is altered (e.g. activation of appliances etc.)

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the air intake circuitCheck condition of the air filter and ensure it is working properly	Move on to Step 1	Fault in the air intake circuit	Renew the air intake circuit
		Move on to Step 1	Filter blocked	Replace the filter element Op. 1048A14 AIR CLEANER FILTERING ELEMENT - REPLACE.
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment to the diagnostic socket.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions for the diagnostic equipment
			Parameters not plausible	Continue following the instructions for the diagnostic equipment
			No communication with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	FUEL FILTER CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check fuel filter operation	Move on to Step 3	Water, petrol, paraffin or dirt found to be present	Clean the tank and pipes and replace the filter element Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE
3	INJECTOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for diesel leaks from the injectors See Test 1060O DIESEL FUEL INJECTION SUPPLY TESTS	Move on to Step 4	One or more injectors found to be leaking	Change the injectors Op. 1060F10 FUEL INJECTORS
4	EGR VALVE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check EGR valve operation following removal	Move on to Step 5	EGR valve blocked open	Replace the EGR valve Op. 1080C10 E.G.R. VALVE - R + R
5	VALVE CLEARANCE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the tappet clearance is correct Op. 1036H14 VALVE TAPPETS - CHECK CLEARANCE	Move on to Step 6	Valve clearance not correct	Replace tappets Op. 1036H10 VALVE TAPPETS - CHECK AND ADJUST CLEARANCE
6	CYLINDER COMPRESSION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out the cylinder compression check	Move on to Step 8	Cylinder compression insufficient	Move on to Step 7
7	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	R/R head for valve leakage test. Op. 1016C10 SINGLE CYLINDER HEAD, REMOVED - OVERHAULCheck condition of cylinders/piston rings	Move on to Step 8	Valve seal insufficient	Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
8	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace the engine management control unit Op. 1060G80 DS ELECTRIC INJECTION CONTROL UNIT - R R

Engine idles unevenly. In particular, level is not consistent and regular when load is altered (e.g. activation of appliances etc.)

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the air intake circuit.Check condition of the air filter and ensure it is working properly	Move on to Step 1	Air intake circuit faulty	Renew the air intake circuit
		Move on to Step 1	Filter blocked	Replace the filter element Op. 1048A14 AIR CLEANER FILTERING ELEMENT - REPLACE.
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment to the diagnostic socket.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions for the diagnostic equipment
			Parameters not plausible	Continue following the instructions for the diagnostic equipment
			No communication with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	FUEL FILTER CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check fuel filter operation	Move on to Step 3	Water, petrol, paraffin or dirt found to be present	Clean the tank and pipes and replace the filter element Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE
3	INJECTOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check for diesel leaks from the injectors See Test 1060O DIESEL FUEL INJECTION SUPPLY TESTS	Move on to Step 4	One or more injectors found to be leaking	Change the injectors Op. 1060F10 FUEL INJECTORS
4	EGR VALVE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check EGR valve operation following removal	Move on to Step 5	EGR valve blocked open	Replace the EGR valve Op. 1080C10 E.G.R. VALVE - R + R
5	VALVE CLEARANCE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the tappet clearance is correct Op. 1036H14 VALVE TAPPETS - CHECK CLEARANCE	Move on to Step 6	Valve clearance not correct	Adjust the tappets Op. 1036H10 VALVE TAPPETS - CHECK AND ADJUST CLEARANCE
6	CYLINDER COMPRESSION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out the cylinder compression check	Move on to Step 8	Cylinder compression insufficient	Move on to Step 7
7	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	R/R head for valve leakage test. Op. 1016C10 SINGLE CYLINDER HEAD, REMOVED - OVERHAULCheck condition of cylinders/piston rings	Move on to Step 8	Valve seal insufficient	Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
8	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace the engine management control unit Op. 1060G80 DS ELECTRIC INJECTION CONTROL UNIT - R R