Engine not running smoothly - juddering

Make: Lancia
Model: Thesis Factory Service Manual
Year: 2002–2009
Section: Engine › Engine not running smoothly - juddering

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Fault diagnosisEngine not running smoothly - juddering

ENGINE NOT RUNNING SMOOTHLY - JUDDERING

2.4 JTD 10V

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: condition of the air intake circuit; that there are no faults in the air filter the seal of the diesel pipes no water, petrol, paraffin or dirt in the fuel tank and filter battery earth terminal fastening	Move on to Step	1. Fault in the air intake circuit	1. Renew the air intake circuit
			2. Air filter blocked	2. Replace the filter element
			3. Leaks from diesel pipes	3. Eliminate the leaks
			4. Water, petrol, paraffin or dirt found to be present.	4. Clean the tank and pipes and replace the filter element
			5. Battery earth terminal insecure	5. Restore the correct earth lead fastening
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step	1. Error detected in the control unit	1. Continue following the instructions for the diagnostic equipment
		Move on to Step	2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
2	ROAD TEST USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step	1. Error detected in the control unit	1. Continue following the instructions for the diagnostic equipment
			2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
			3. No communication with the control unit	3. Restore the connection between the engine management control unit and the diagnostic connector
3	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists control unit defective	Replace the engine management control unit See in Op. 1060G80 Diesel electronic injection system CONTROL UNIT - R.R.

2.0 TB, 2.4 20V, 3.0 V6

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	First, check: condition of the air filter; battery correctly fastened to earth; (Wiring Diagram ) E1010 POWER SUPPLY	Move on to Step	1. Filter element dirty, damaged or not correctly fitted	1. Replace or restore the correct filter element fitting See in Op. 1048A14 air cleaner filtering element - replace.
		Move on to Step	2. Fastening to earth incofrect	2. Restore wiring
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.Check: that there are no faults in the engine management control unit; parameter plausibility	Move on to Step	1. "Fuel system" error detected	1. Continue following the instructions in Table Z050
			2. "Upstream Lambda sensor" error detected	2. Continue following the instructions in Table Z056
			3. Another error detected in the control unit	3. Continue following the instructions for the diagnostic equipment
			4. Parameter not consistent	4. Continue following the instructions for the diagnostic equipment
2	ROAD TEST USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.Check: that there are no faults in the engine management control unit; parameter plausibility	Move on to Step	1. "Fuel system" error detected	1. Continue following the instructions in Table Z050
			2. "Upstream Lambda sensor" error detected	2. Continue following the instructions in Table Z056
			3. The sudden onset of another error in the control unit is detected	3. Continue following the instructions for the diagnostic equipment
			4. Parameter not consistent	4. Continue following the instructions for the diagnostic equipment
3	FUEL PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the fuel supply pressure, if necessary on the road (to reproduce the conditions in which the problem occurs) See in Op. 0510C10 FUEL SYSTEM - Check DELIVERY PRESSURE	Move on to Step	1. Pressure not correct: obstructions in the fuel supply pipe	1. Remove the obstructions in the fuel pipe, replace it if necesary
		Move on to Step	2. Pressure not correct: petrol pump damaged	2. Replace the petrol pump assembly See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R.
4	AIR CONDITIONING SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Road test the vehicle, checking that the irregular behaviour does not occur when the air conditioning is switched on or off	Move on to Step	Fault only present with the air conditioning switched on	Continue following the instructions in Table L010
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists control unit defective	Replace the control unit See in Op. 1056B52 Air flow meter ELECTRONIC MODULE - R.R.

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Parts & tools for this job For 2002 Lancia Thesis

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