22 · Diagnostics

Engine not running smoothly

Make: Fiat
Model: Ulysse Factory Service Manual
Year: 2002–2010
Section: Engine › Engine not running smoothly

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Fault diagnosisEngine not running smoothly

ENGINE NOT RUNNING SMOOTHLY

2.0 16V JTD, 2.2 16V JTD

There are falls in performance during acceleration

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 the accelerator pedal travel that there are no obstructions in the exhaust pipe; no water, petrol, paraffin or dirt in the fuel tank and fuel filter	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. Accelerator pedal does not complete its full travel	4. Eliminate the cause of the problem
			5. obstructions in the exhaust system	5. Replace the damaged system component
			6. Water, petrol, paraffin or dirt found to be present	6. Clean the tank and pipes and replace the filter element
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	TURBOCHARGER CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the operation of the turbocharger as described in TEST 1064BA	Move on to Step	1. Turbocharger faulty	1. Replace the turbocharger unit
4	EGR VALVE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check EGR valve operation following removal	Move on to Step	1. EGR valve blocked open	1. Replace the EGR valve
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		1. Fault persists control unit defective	1. Replace the control unit

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Parts & tools for this job Staging For 2002 Fiat Ulysse

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