B13 ENGINE STARTS WITH DIFFICULTY' - Alfa - 156 - eLearn

3233006 - B13 ENGINE STARTS WITH DIFFICULTY'

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: if there is service information on the subject the condition of the air intake circuit Remove the spark plugs and check the condition of the spark plugs and make sure that the gap is correct	Continue to Step 1	Air intake circuit component damaged	Repair or replace the defective component
			Air filter blocked	Replace the filter Op. 1048A10
			Spark plugs damaged	Replace the spark plugs
			Spark plugs wet	Dry the spark plugs and move on to step 1
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 the plausibility of the parameters in particular the Rail pressure - rail pressure setting (check especially during starting) engine temperature	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
			unreliable parameters	Continue according to the instructions for the diagnostic equipment
			Pressure measured differs greatly from the setting	Proceed with checking the low pressure circuit, high pressure pump, pressure regulator, wiring, control unit
2	LOW SUPPLY PRESSURE CIRCUIT CHECK	All OK	Problems met	Operation
	Check that the fuel pressure is correct Op. 0510C10	Continue to Step 3	Fuel pressure too low: supply pipe obstructed	Eliminate the blockage; if necessary replace the pipe
	Check that the fuel pressure is correct Op. 0510C10	Continue to Step 3	Low fuel pressure: defective pump	Replace the pump assembly (see Op. 1040A70
3	CHECK ON TIMING	All OK	Problems met	Operation
	Check that the timing is correct Op. 0510A10	Continue to Step 4	Timing not correct	Restore the correct timing Op. 1032B14
4	CHECK ON CYLINDER COMPRESSION	All OK	Problems met	Operation
	Carry out the cylinder compression test Op. 0510A10	Continue to Step 6	Cylinder compression insufficient	Continue to Step 5
5	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems met	Operation
	Carry out R/R on head to check the valve seal Op. 1016C10 Check the condition of the cylinders/piston rings	Continue to Step 6	Insufficient valve seal	Overhaul the cylinder head Op. 1016E10
			Cylinders/piston rings worn	Repair the leak
			Faulty coupling between head/cylinder block-crankcase	Restore correct coupling
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit faulty	Replace engine management control unit Op. 1056B82