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Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Black exhaust fumes

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Emissions › Black exhaust fumes
Fault diagnosisBlack exhaust fumes

BLACK EXHAUST FUMES

1.3 Multijet

A high level of dark coloured exhaust fumes is noted.

Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Check whether the problem is associated with oil consumption.Move on to Step 1Excessive oil consumption

Proceed as instructed in the

See table X005 EXCESSIVE OIL CONSUMPTION

1AIR CIRCUIT CHECKAll OKProblems encounteredOperation

Check:

- the condition of the air filter;

- the condition and seal of the air supply circuit.

Move on to Step 2Circuit component damagedReplace the damaged component.
Filter element dirty or damaged.

Replace the filter element

Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.

2All OKProblems encounteredOperation
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 3Errors detected.Continue following the instructions given by the diagnostic equipment.
No dialogue with the engine management control unit.

Restore the correct connection between the engine management control unit and the diagnostic socket

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

3CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Keeping the diagnostic equipment connected, carry out active diagnosis of the injectors.Move on to Step 4Connections faulty.

Restore the correct connection for the injectors and the solenoid with the engine management control unit

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

Injectors faulty.

Replace the injectors

Op. 1060F10

4FUEL PRESSURE CHECKAll OKProblems encounteredOperation

Check the correct fuel supply pressure by performing

See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK

End of diagnosisPressure not correct.

Replace the fuel pump assembly

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

Parts & tools for this job For 2007 Fiat 500

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