Engine not running smoothly / (losing power)

Make: Fiat
Model: Ulysse Factory Service Manual
Year: 2002–2010
Section: Engine › Engine not running smoothly / (losing power)

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Fault diagnosisEngine not running smoothly / (losing power)

ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER)

2.0 16V JTD, 2.2 16V JTD

Prolonged performance reductions occur under constant load and speed conditions.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: no leaks in fuel circuit; condition of the air intake circuit; exhaust system working correctly; no water in the diesel filter	Move on to Step	1. Leaks in fuel circuit	1. Adjust pipe tightness to correct setting and replace if necessary
			2. Fault in the air intake circuit	2. Renew the air intake circuit
			3. Obstruction in exhaust system	3. Replace the damaged exhaust system component
			4. Water in diesel fuel	4. Clean the tank and replace the filter
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 keeping the diagnostic equipment connected. Check: that there are no errors in the control unit; parameter plausibility	Move on to Step	1. The sudden onset of errors in the control unit is detected	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
3	BRAKE PEDAL SWITCH CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the pedal switch is working properly See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT	Move on to Step	1. Brake pedal does not return	1. Eliminate the cause of the sticking
			2. Switch stuck closed	2. Replace the switch
			3. Wiring short circuited	3. Eliminate the cause of the problem See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
4	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

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Parts & tools for this job Staging For 2002 Fiat Ulysse

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