B20 ENGINE STARTS, AND CUTS OUT STRAIGHT AWAY - Alfa - 147 - eLearn

3022567 - B20 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
	Preliminarily check: that the inertia switch has not cut in; the state of the spark plugs; connections and the state of the spark plug leads; absence of obstructions in the catalytic converter	Continue to Step 1	Operation of inertia switch	Restore correct operation
			Spark plugs dirty or damaged	Replace the spark plugs Op. 5510D10
			Spark plug leads damaged	Replace the cables
			Catalytic converter's obstructed	Replace catalytic converter/s
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check: for errors in the control unit 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	Unreliable parameters	Continue following the instructions for the diagnostic equipment
2	SUPPLY PRESSURE CHECK	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	CHECK 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 the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
		Continue to Step 4	Pump faulty	Replace petrol pump Op. 1040A70
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists: control unit faulty	Replace control unit Op. 1056B82 Search for the fault starting from another symptom'