D001 ENGINE NOT RUNNING SMOOTHLY / (HESISTANT) - Fiat - GRANDE PUNTO - eLearn

199002952 - D001 ENGINE NOT RUNNING SMOOTHLY / (HESISTANT)

There is a (prolonged) drop in performance (flat spots) during acceleration

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	First, check: status of spark plugs and leads; the condition of the air intake circuit	Move on to Step 1	Spark plugs dirty or damaged	Replace the spark plugs Op. 5510D10 SPARK PLUGS - R+R
			Spark plug leads damaged	Replace spark plug leads
			Air intake circuit faulty	Eliminate the fault
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment to the diagnostic socket. Check: that there are no faults in the engine management control unit; parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions on the diagnostic equipment
		Move on to Step 2	Parameter not consistent	Continue following the instructions on the diagnostic equipment
2	ROAD TEST USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	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 3	The sudden onset of an error in the control unit is detected	Continue following the instructions on the diagnostic equipment
		Move on to Step 3	Parameter not consistent	Continue following the instructions on the diagnostic equipment
3	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Carry out a road test, reproducing the conditions in which the problem occurs.Check the fuel supply pressure Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE	Move on to Step 4	Pressure not correct: obstructions in the fuel supply pipe	Remove the obstructions in the fuel pipe, replace it if necessary
			Pressure not correct: tank not sufficiently ventilated	Restore the tank ventilation
			Pressure not correct: fuel pump electric circuit interrupted	Restore fuel pump electric circuit
			Pressure not correct: petrol pump damaged	Replace the petrol pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present		The fault persists: control unit defective	Replace the control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R