22 · Diagnostics

Black exhaust fumes

Make: Alfa Romeo
Model: GT Factory Service Manual
Year: 2003–2010
Section: Emissions › Black exhaust fumes

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Fault diagnosisBlack exhaust fumes

BLACK EXHAUST FUMES

1.8 T.SPARK

There are a great deal of exhaust fumes, with dark coloured smoke;

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check whether the problem is connected with oil consumption	Continue to Step 1	Excessive oil consumption	See table See table X05 EXCESSIVE OIL CONSUMPTION
1	CHECKING AIR CIRCUIT	All OK	Problems met	Operation
	Verify: The state of the air filter; Check the condition and seal of the air supply circuit	Continue to Step 2	Circuit component damaged	Replace faulty component
		Continue to Step 2	Filter element dirty or damaged	Replace the filter element
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no fault in the engine management control unit	Continue to Step 3	''Fuel system'' error appears	See table See table Z50 MIXTURE STRENGTH ERROR
			''Upstream lambda sensor'' error detected	See table See table Z56 UPSTREAM LAMBDA SENSOR SIGNAL ERROR
			''Downstream lambda sensor'' error detected	See table See table Z58 DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
			Another error dected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
3	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 4	Injector connections faulty	Restore the connection of the injectors with the control unit See See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
		Continue to Step 4	Injectors faulty	Replace injectors Op. 1056B70
4	CHECKING FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op. Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE	Continue to Step 5	Pressure not correct	Replace the fuel pump assembly
5	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom''

There are a great deal of exhaust fumes, with dark coloured smoke;

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check whether the problem is connected with oil consumption	Continue to Step 1	Excessive oil consumption	See table See table X05 EXCESSIVE OIL CONSUMPTION
1	CHECKING AIR CIRCUIT	All OK	Problems met	Operation
	Verify: The state of the air filter; Check the condition and seal of the air supply circuit	Continue to Step 2	Circuit component damaged	Replace faulty component
		Continue to Step 2	Filter element dirty or damaged	Replace the filter element
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no fault in the engine management control unit	Continue to Step 3	''Fuel system'' error appears	See table See table Z50 MIXTURE STRENGTH ERROR
			''Upstream lambda sensor'' error detected	See table See table Z56 UPSTREAM LAMBDA SENSOR SIGNAL ERROR
			''Downstream lambda sensor'' error detected	See table See table Z58 DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
			Another error dected in the control unit	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
3	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 4	Injector connections faulty	Restore the connection of the injectors with the control unit See See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
		Continue to Step 4	Injectors faulty	Replace injectors Op. 1056B70
4	CHECKING FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op. Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE	Continue to Step 5	Pressure not correct	Replace the fuel pump assembly
5	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom''

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Parts & tools for this job For 2003 Alfa Romeo GT

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