D21 ENGINE CUTS OUT WHILST DRIVING - Alfa - 166 - eLearn

3308609 - D21 ENGINE CUTS OUT WHILST DRIVING

When driving with the engine hot, it suddenly cuts out and then, a few moments later, starts normally.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check that there is fuel in the tank	Continue to Step 1	No fuel	Restore:
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Verify: that there are no faults in the engine management control unit the plausibility of all the parameters	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
		Continue to Step 2	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT )
2	FUEL FILTER CHECK	All OK	Problems met	Operation
	Check the operation of the fuel filter	Continue to Step 3	Presence of water, petrol, paraffin or dirt detected	Clean tank and pipes and replace filter element Op. 1044B20
3	CHECK RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check the pressure between the twin manifold and the return pipe to the tank: See Test 1060A Check low pressure fuel circuit	Continue to Step 4	Pressure over 1 bar: the return circuit to the tank is clogged	Remove any blockages in the return pipe or the cage for the low pressure pump immersed in the tank
4	CHECK ON DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check filter between diesel filter and 'radialjet' high pressure pump See Test 1060B Check low pressure fuel circuit	Continue to Step 5	Leaks in circuit	Eliminate fuel leaks from pipes/low pressure circuit connections
			Pressure under 1.8 bar or difference in pressure between Test B and Test A less than 1 bar	Replace valve on diesel filter mounting Op. 1044B16 Replace fuel pump Op. 1040A70
			Pressure over 3.5 bar	Replace valve on diesel filter mounting Op. 1044B16
5	INJECTOR LEAK TEST	All OK	Problems met	Operation
	Check whether diesel is leaking from the injectors: See Test 1060C Check high pressure fuel circuit	Continue to Step 6	One or more injectors leaking	Replace injector(s) Op. 1060F10
6	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Check diesel pressure parameter measured with diagnostic instrument: See Test 1060D Check high pressure fuel circuit	Continue to Step 7	Pressure reading below 150 bar	Replace high pressure pump Op. 1060E10
		Continue to Step 7	Leaks in circuit	Eliminate fuel leaks from high pressure circuit pipes/connectors
7	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'