D02 ENGINE NOT RUNNING SMOOTHLY (NOT FIRING PROPERLY) - Lancia - THESIS - eLearn

72400 - D02 ENGINE NOT RUNNING SMOOTHLY (NOT FIRING PROPERLY)

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
	First, check: condition of the air filter; the condition of the air intake circuit;	Move on to Step	1. Filter blocked	1. Replace the filter element See in Op. 1048A14 air cleaner filtering element - replace.
		Move on to Step	2. Air intake circuit faulty	2. Eliminate the fault
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. "Misfire" error detected	2. Continue following the instructions in Table Z053
			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. "Misfire" error detected	2. Continue following the instructions in Table Z053
			3. The sudden onset of another error is detected	3. Continue following the instructions for the diagnostic equipment
			4. Parameters not consistent	4. Continue following the instructions for the diagnostic equipment
3	FUEL PRESSURE ROAD TEST	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out a road test and check the fuel supply pressure < R1 > in the conditions in which the problem occurs See in Op. 0510C10 FUEL SYSTEM - Check DELIVERY PRESSURE	Move on to Step	1. Fuel pressure too low: pipes obstructed	1. Eliminate the constrictions, replace the pipes if necessary
		Move on to Step	2. Fuel pressure too low: pump defective	2. Replace the fuel pump assembly See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R.
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 See in Op. 1056B82 Injection/ignition system CONTROL UNIT (one) - R.R.