22 · Diagnostics

Excessive exhaust fumes

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Emissions › Excessive exhaust fumes

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Fault diagnosisExcessive exhaust fumes

EXCESSIVE EXHAUST FUMES

1.9 JTD 8V

There are a great deal of exhaust fumes, with dense smoke and a higher level of particles than specified.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: engine oil level the condition of the air filter	Continue to Step 1	Oil level too high	Restore the correct level
		Continue to Step 1	Filter element dirty or damaged	Replace the filter element Op. 1048A14
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check: that there are no faults in the engine management control unit plausibility of all the parameters	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	BLOW-BY CIRCUIT CHECK	All OK	Problems met	Operation
	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	Continue to Step 3	Blow-by circuit faulty	Restore the correct operation of the circuit: if necessary, replace the pipes (see Assembly 1080D)
		Continue to Step 3	Fault in the separator	Replace the separator Op. 1080D34
3	AIR CIRCUIT CHECK	All OK	Problems met	Operation
	Check the condition and seal of the air supply circuit (upstream of the turbocharger)	Continue to Step 4	Circuit component damaged	Replace the component (see Assembly 1048A)
4	CHECK AIR INTAKE PIPES	All OK	Problems met	Operation
	Check to see if there is oil in air intake pipes (downstream of the turbocharger)	Continue to Step 5	There are traces of oil in the pipes	Clean the pipes or the heat exchanger (see Assembly 1048B)
5	VALVE CLEARANCE CHECK	All OK	Problems met	Operation
	Check that the valve tappet clearance is correct. Op. 1036H14	Continue to Step 6	Clearance not correct	Restore the correct valve clearance. Op. 1036H18
6	CYLINDER COMPRESSION CHECK	All OK	Problems met	Operation
	Carry out the cylinder compression test Op. 0510A10	Continue to Step 7	Compression values not correct	Restore the correct cylinder compression, e.g by checking the injector seal Op. 1056B70
7	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

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Parts & tools for this job For 1998 Fiat Multipla

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