Workshop Manuals Factory service & repair

Alfa Romeo 147 Factory Service Manual (2000-2002)18 · Fault diagnosis

18 · Diagnostics

W05 White smoke at exhaust

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Emissions › W05 White smoke at exhaust

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Fault diagnosisW05 White smoke at exhaust

W05 White smoke at exhaust

There is a large amount of exhaust fumes, with light coloured smoke

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Preliminarily check that the fuel tank contains no water or other fluids	OK	Move onto step 1
0		Presence of dirt in the fuel tank	Clean the fuel tank End of diagnosis
1	CHECKING DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner or other instruments) to the engine management control unit. Check there are no faults in the engine management control unit	OK	Move onto step 2
		An error is detected in the control unit	Continue following the instructions for the diagnostic equipment End of diagnosis
		Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL End of diagnosis
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors.	OK	Move onto step 3
		Injector connections faulty	Restore the connection of the injectors with the control unit Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL End of diagnosis
		Faulty injector	Replace injector Op. 1056B70 End of diagnosis
3	CHECKING CYLINDER HEAD GASKET Verify: That the cylinder head tightening is correct The gasket seal	OK	Move onto step 4
		Cylinder head tightening not correct	Restore the correct tightening End of diagnosis
		Gasket damaged	Replace the gasket Op. 1016C10 End of diagnosis
4	CHECKING BLOW-BY CIRCUIT Check the condition of the blow-by gases intake circuit. In particular, check that there are no obstructions in the separator or in the pipes	OK	Move onto step 5
4		Blow-by circuit faulty	Restore the correct operation of the circuit: if necessary, replace the pipes End of diagnosis
5	CHECKING CORRECT OPERATION Check that the fault is no longer present	OK	Incorrect selection of diagnostic procedure
5		Fault persists	Incorrect selection of diagnostic procedure

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Parts & tools for this job For 2000 Alfa Romeo 147

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