Engine starts, and cuts out straight away

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Starting › Engine starts, and cuts out straight away

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Fault diagnosisEngine starts, and cuts out straight away

ENGINE STARTS, AND CUTS OUT STRAIGHT AWAY

The engine starts, with difficulty and then immediately cuts out suddenly.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check: that the inertia switch has not been operated; the state of the spark plugs; connections and the state of the spark plug leads; for any obstructions of the catalyzer;	Continue to Step 1	Intervention of inertia switch	Restore correct operation
			Spark plugs dirty or damaged	Replace the spark plugs Op. 5510D10
			Spark plug leads damaged	Replace the cables Op. 5510D14
			Catalytic converter obstructed	Replace the exhaust manifold Op. 1072C16
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Verify: that there are no errors in the control unit the plausibiilty of the parameters	Continue to Step 2	Error detected in the control unit	Continue following the instructions given by the diagnostic equipment
		Continue to Step 2	Implausible parameters	Continue following the instructions given by the diagnostic equipment
2	CHECKING DELIVERY PRESSURE	All OK	Problems met	Operation
	With the ignition ON and the engine switched off, check the fuel supply pressure Op. 0510C10 Start up the engine and check that the supply pressure does not decrease	Continue to Step 4	The supply pressure decreases	Continue to Step 3
3	CHECKING PETROL PUMP ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check the petrol pump supply and earth See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 4	Connections not correct	Restore connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace control unit Op. 1056B82

The engine starts, with difficulty and then immediately cuts out suddenly.

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the diagnostic equipment (Examiner or other instruments) to the tester input and check the engine management control unit: that there are no errors in the control unit the plausibiilty of the parameters	Continue to Step 2	Error detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Implausible parameters	Continue according to the instructions for the diagnostic equipment
2	SPARK PLUG CONDITION CHECK	All OK	Problems met	Operation
	Remove the spark plugs and check the condition of the spark plugs and make sure that the gap is correct	Continue to Step 3	Spark plug fault	Replace the spark plugs
			Actuator damaged	Replace the pneumatic actuator
			Pipes blocked	Eliminate the blockage; if necessary replace the pipes
3	CHECKING DELIVERY PRESSURE	All OK	Problems met	Operation
	With the ignition ON and the engine switched off, check the fuel supply pressure. Replace the fuel pump assembly Op. 0510C10 Start up the engine and check that the supply pressure does not decrease	Continue to Step 4	The supply pressure decreases	Replace the fuel pump assembly Op. 1040A70
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace control unit Op. 1056B82 Search for the fault starting from another symptom'

The engine starts, with difficulty and then immediately cuts out suddenly.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check that: there are no fuel leaks; there is no water in the diesel; there is diesel in the tank and its quality; there are no obstructions in the catalyzer	Continue to Step 1	Fuel leaks detected	Eliminate the leaks and put diesel in the tank
			Catalytic converter obstructed	Replace the catalyzer Op. 1080B62
			Water in diesel	Eliminate the water from the diesel
			Poor quality diesel	Drain and flush the tank Op. 1040A10and replace the diesel with one of better quality
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Verify: that there are no errors in the control unit the plausibiilty of the parameters	Continue to Step 2	Error detected in the control unit	Continue following the instructions given by the diagnostic equipment
		Continue to Step 2	Implausible parameters	Continue following the instructions given by the diagnostic equipment
2	CHECK ON INLET MANIFOLD THROTTLE VALVE	All OK	Problems met	Operation
	Manually check that the throttle valve in the inlet manifold and the pneumatic actuator are working properly	Continue to Step 3	Throttle valve stuck in closed position	Eliminate the cause of the sticking, if necessary replace the valve
			Actuator damaged	Replace the pneumatic actuator
			Pipes blocked	Eliminate the blockage; if necessary replace the pipes
3	CHECK ON SOLENOID OPERATION	All OK	Problems met	Operation
	Conduct active diagnosis of: flow increase solenoid flow decrease solenoid	Continue to Step 5	Element not working	Continue to Step 4
4	CHECK ON SOLENOID OPERATION	All OK	Problems met	Operation
	Check supply and earth of malfunctioning device See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT	Continue to Step 5	Component defective	Replace faulty component
		Continue to Step 5	Connections not correct	Restore connections See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
5	CHECK FOR PRESENCE OF AIR	All OK	Problems met	Operation
	Check that there is no air in the fuel injection system	Continue to Step 6	Air present	Bleed the air
6	CHECK ON DIESEL FILTER	All OK	Problems met	Operation
	Check that the diesel filter is not clogged	Continue to Step 7	Diesel filter clogged	Replace the filter Op. 1044B10
7	CHECK ON FUEL INJECTION PUMP TIMING	All OK	Problems met	Operation
	Check the timing of the fuel injection pump Op. 1060A20	Continue to Step 8	Fuel injection pump timing incorrect	Restore the correct timing Op. 1060A20
8	REPLACING FUEL INJECTION PUMP	All OK	Problems met	Operation
	Replace the fuel injection pump Op. 1060A10and check that the engine is working properly	End of diagnosis	Fault persists: control unit defective	Replace control unit Op. 1060D80

The engine starts, with difficulty and then immediately cuts out suddenly.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check, in order: that there is no water, other fluids or dirt in the fuel filter that there is no water, other fluids or dirt in the fuel tank that there are no obstructions in the catalyzer	Continue to Step 1	There is water, other fluids or dirt in the fuel filter	Replace the filter element
			There is water, other fluids or dirt in the fuel tank	Cleaning tank
			Catalytic converter obstructed	Replace the catalyzer
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Recreate the conditions in which the problem occurs and check: that there are no errors in the control unit the plausibiilty of the parameters	Continue to Step 2	Errors detected in the control unit	Continue following the instructions for the diagnostic equipment
			Implausible parameters	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the correct connections See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check as described in Test 1060D that the diesel pressure parameter is correct	Continue to Step 10	Pressure not correct	Continue to Step 3
3	CHECK RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check as described in test 1060A that the pressure in the return pipe to the tank is under 1 bar	Continue to Step 4	Pressure above maximum limit (return pipe to tank blocked)	Repair the pipe; if necessary replace it.
4	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check that the diesel pressure between filter and radial jet pump - see Test 1060 B - is between 2 and 3 bar.	Continue to Step 10	Pressure below minimum limit or above maximum limit	Continue to Step 5
5	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Choke the return pipe from the pressure regulating valve and repeat test 1060B with the pipe choked, checking that the pressure at the filter outlet is below 2 bar	Continue to Step 6	Pressure rises to 5 bar: pressure regulating valve on filter mounting out of adjustment	Replace the valve Op. 1044B16
6	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Continue to Step 7	Difference in pressure over 1 bar	Replace the fuel filter cartridge Op. 1044B10
7	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check that the pressure of the supply pump at the filter inlet is over 2.2 bar	Continue to Step 10	Pressure below 2.2 bar	Continue to Step 8
8	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Measure the difference in pressure between electric pump outlet and filter inlet and check that it is less than 0.3 bar	Continue to Step 9	Difference in pressure over 0.3 bar	Replace the pipe
9	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check as described in test 1040AA that the pump's supply voltage is 12V and that the absorbed current is between 2 and 10 amps.	Continue to Step 10	Voltage below 12 V	Check wiring, intervention on connection cables See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
			Current greater than 10 amp.: pump faulty	Replace fuel pump assembly Op. 1040A70
			Current below 2 amp.: jet pump blocked	Replace fuel pump assembly Op. 1040A70and clean the fuel tank
10	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Replace theDRV high-pressure regulating valve and check that the fault is no longer present.	End of diagnosis	Fault persists	Continue to Step 11
11	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Replace the pressure pump and check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace engine management control unit Op. 1060G80

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Parts & tools for this job For 2000 Fiat Doblò

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