23 · Diagnostics

Excessive exhaust fumes

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Emissions › Excessive exhaust fumes

‹ Prev Black exhaust fumes Next › Pollutant emissions in vehicle

Fault diagnosisExcessive exhaust fumes

EXCESSIVE EXHAUST FUMES

1.9 JTD 8V, 1.9 JTD 16V, 2.4 JTD 20V

The customer complains of: Excessive blue fumes

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Results of the tests
	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 See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Check the operation of the low pressure supply circuit See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT	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
1	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: EDC 16C39 Diesel electronic injection control unit. Check the value of the following parameters: . Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK . Measured air mass See Test 1060GG MEASURED AIR MASS CHECK . Atmospheric pressure See Test 1060GD ATMOSPHERIC PRESSURE CHECK . Engine coolant temperature See Test 1060OE CHECK ON OPERATION OF COOLANT TEMPERATURE SENSOR . Diesel temperature See Test 1060EA DIESEL FUEL TEMPERATURE CHECK . Engine rpm See Test 1060GI ENGINE SPEED CHECK	Move on to Step 2
2	PREHEATING RELAY ACTIVE DIAGNOSIS	All OK	Problems encountered	Operation
	Carry out the active diagnosis for the preheating relay, checking that the result is positive. The check on the following system is only necessary if the outside temperature is below 0 °C.	Move on to Step 4	The result of the active diagnosis is negative	Move on to Step 3
3	HEATER PLUGS CHECK	All OK	Problems encountered	Operation
	Check that the heater plugs are working properly See Test 5520CA GLOW PLUGS FUNCTIONAL TEST	Move on to Step 4
4	ELECTRICAL EQUIPMENT CHECK	All OK	Problems encountered	Operation
	Check that fuse F1 has not blown (it is the last one at the bottom of the vertical row)	Move on to Step 5	Fuse F1 has blown	Restore the connections or, if necessary, replace the junction unit in the engine compartment Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
		Move on to Step 5	Fuse F1 has blown		5	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED	End of diagnosis	Cylinder compression insufficient	Move on to Step 6
7	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	Carry out the Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal Check condition of cylinders/piston rings	End of diagnosis	Valve seal insufficient	Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
		End of diagnosis	Cylinder/ring wear outside tolerances	Restore correct operating clearances

1.8, 1.9 JTS, 2.2 JTS, 3.2 JTS

High exhaust fume levels are noted, with dense fumes and more particulate that specified

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check engine oil level. Check air filter conditions	Move on to Step 1	Excessive oil level	Restore correct oil level
	Check engine oil level. Check air filter conditions	Move on to Step 1	Filter element dirty or damaged	Replace the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check that there are no errors present in the engine management control unit	Move on to Step 2	Error detected.	Continue following the instructions for the diagnostic equipment.
		Move on to Step 2	No dialogue with the engine management control unit.	Restore the correct connection between the engine management control unit and the diagnostic socket See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
2	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit. In particular, check for obstructions in the separator or pipes	Move on to Step 3	Fault detected in the blow-by circuit	Restore circuit to working order: replace the pipes if necessary
		Move on to Step 3	Fault in the separator	Replace the separator
3	AIR CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition and seal of the air intake circuit: in particular, check for oil in the pipes.	Move on to Step 4	Circuit component damaged	Replace the damaged component
		Move on to Step 4	Oil in the intake pipes	Clean the pipes (check source of oil)
4	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out cylinder compression check Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS	Move on to Step 6	Cylinder compression insufficient	Move on to Step 5
5	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	(only for 2.2. JTS version) R.R. head Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal Check condition of cylinders/piston rings	Move on to Step 6	Valve seal insufficient	(only for 2.2. JTS version) Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
	(only for 3.2 V6 version) R.R. head Op. 1016D10 CYLINDER HEAD – R.R. AND REPLACE GASKETS to check the valve seal Check condition of cylinders/piston rings	Move on to Step 6	Valve seal insufficient	(only for 3.2 V6 version) Overhaul the head Op. 1016E20 CYLINDER HEAD (ONE), LEFT OR RIGHT, REMOVED - OVERHAUL
6	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Contact Technical Service for further information on the problem.

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