Engine cuts out when idling (then restars)

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Engine › Engine cuts out when idling (then restars)

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Fault diagnosisEngine cuts out when idling (then restars)

ENGINE CUTS OUT WHEN IDLING (THEN RESTARS)

1.4 16v

The customer complains that: The engine cuts out whilst it is running; it can be restarted

1	FUEL SUPPLY CIRCUIT CHECKS	All OK	Problems encountered	Operation
	Check that the air intake/vacuum circuit is working properly Check the condition of the fuel supply circuit and make sure that it is working properly. Also check: - wiring on engine correctly fastened to earth; - battery correctly fastened to earth; - positive battery terminal and all leads connected to it correctly fastened	Move on to Step 2	Supply fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
		Move on to Step 2	Earth fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
2	CHECKS USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	With the Examiner connected to the engine control unit, check for the presence of any errors	Move on to Step 3	Presence of errors	Continue as instructed by the diagnostic equipment
3	MOTORIZED THROTTLE CHECK	All OK	Problems encountered	Operation
	- Check that the motorized throttle is working properly See Test 1056BW Check on the throttle body actuator operation - Check the continuity of the wiring between the engine control unit and the motorized throttle	End of diagnosis	Motorized throttle defective	Replace the motorized throttle Op. 1056B14 THROTTLE CASE - R + R

1.9 JTD 8v, 1.9 JTD 16v

The customer complains that: The engine cuts out whilst it is running; it can be restarted

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Check that the engine oil level is correct Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the See Test 1040OA Fuel supply circuit check Also check: · wiring on engine correctly fastened to earth; · battery correctly fastened to earth; · positive battery terminal and all leads connected to it correctly fastened	Move on to Step 1	Oil level incorrect	Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
			Supply fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
			Earth fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
1	MODE PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit. Check the value of the following parameters: · Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK · Engine coolant temperature See Test 5030AA COOLANT TEMPERATURE SENSOR CHECK · Diesel temperature · Target Diesel pressure · Measured Diesel pressure See Test 1060GH DIESEL PRESSURE CHECK · Engine rpm	Move on to Step 2
2	PARTICULATE FILTRATION SYSTEM CHECKS	All OK	Problems encountered	Operation
	Check that the DPF system is working properly, carrying out the See Test 1080BE PARTICLE FILTER SATURATION CHECK	Move on to Step 3
3	INJECTOR HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check, as instructed in the See Test 1060OC INJECTOR SEAL TEST that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another.	Move on to Step 4	Significant leak from one injector	Replace the injector Op. 1060F10 FUEL INJECTORS - R.R.
4	HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OD Injector high pressure fuel circuit check that the diesel pressure parameter is correct.	Move on to Step 11	Pressure not correct	Move on to Step 5
5	LOW RETURN PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OA Low pressure fuel return circuit check that the pressure in the return pipe to the tank is less than 1 bar.	Move on to Step 6	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe; if necessary, replace it
6	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OB Low pressure fuel supply circuit check that the diesel pressure between the filter and the pressure pump is between 3.5 and 5 bar.	Move on to Step 7	Pressure below the minimum limit or above the maximum limit	Move on to Step 10
7	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check by carrying out the See T CHECK ON CHANGE IN PRESSURE AT THE FUEL FILTER that the difference in pressure upstream and downstream of the filter is less than 1 bar.	Move on to Step 8	Difference in pressure more than 1 bar	Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the supply pump pressure at the filter inlet is between 3.5 and 5 bar	Move on to Step 9	Pressure below 3.5 bar	Move on to Step 10
9	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.3 bar	Move on to Step 10	Difference in pressure more than 0.3 bar	Replace the pipe
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A	Move on to Step 11	Voltage lower than 12 V	Renew electrical wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
			Current greater than 10 A: pump defective	Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
			Current less than 2 A: pump obstructed	Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank
11	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R and check that the fault is no longer present	End of diagnosis	Fault persists	Contact technical service for further information on the problem

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Parts & tools for this job For 2007 Fiat Bravo

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