Workshop Manuals Factory service & repair Fiat
Fiat Bravo Factory Service Manual (2007-2014)22 · Fault diagnosis
22 · Diagnostics

Excessive fuel consumption

Make
Fiat
Model
Bravo Factory Service Manual
Year
2007–2014
Section
Consumption /leaks/ wear › Excessive fuel consumption
Fault diagnosisExcessive fuel consumption

EXCESSIVE FUEL CONSUMPTION

1.9 JTD 8v

The engine operates in a way that appears normal, but the fuel consumption is higher than that recorded in the past. The consumption data recorded in the vehicle technical documentation is defined during the course of approval tests in accordance with directive 93/116/CE.

These tests simulate an urban cycle and an average non-urban cycle and therefore may not be representative as fuel consumption depends a great deal on driving styles

TEST RESULTS
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION

Check the following:

condition of the air filter;

condition of the fuel filter.

Check the exhaust circuit, paying particular attention to any obstructions in the pipes

Move on to Step 1

1. Filter element dirty or damaged.

2. Fuel filter dirty

3. Outlets obstructed.

4. Exhaust system obstructed.

1. Replace the filter element

2. Replace the fuel filter

Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE

3. Replace the complete exhaust pipe

4. Replace the defective system component.

1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the engine management control unit:

- in error mode;

- that there are no faults;

- in parameters mode;

- the plausibility of all the parameters.

Move on to Step 2Error detected in the engine management control unit.Continue following the instructions given by the diagnostic equipment.
2HIGH PRESSURE CIRCUIT CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check the fuel supply circuit, high pressure side, carrying out the

See Test 1060OD Injector high pressure fuel circuit check

Move on to Step 3

1. Pressure not correct: pressure regulator faulty.

2. Pressure not correct: injector manifold faulty.

3. Pressure not correct: injectors faulty.

4. Pressure not correct: pipe from pump to manifold faulty.

5. Pressure not correct: pipe from manifold to injector faulty

1. Replace the pressure regulator

Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R.

2. Replace injector manifold

Op. 1060F30 SINGLE FUEL MANIFOLD PIPE - R.R.

3. Replace the injectors

Op. 1060F10 FUEL INJECTORS - R.R.

4. Replace the pipe.

5. Replace the pipe.

3LOW PRESSURE CIRCUIT CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check the fuel supply circuit, low pressure side, carrying out the

See Test 1060OA Low pressure fuel return circuit check

and the

See Test 1060OB Low pressure fuel supply circuit check

End of diagnosis

1. Pressure not correct: fuel filter faulty.

2. Pressure not correct: electric pump faulty.

3. Pressure not correct: return manifold faulty.

4. Pressure not correct: fuel return pipe faulty.

1. Replace the fuel filter

Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE

2. Replace the electric pump

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

3. Replace the manifold

Op. 1060F50 FUEL RETURN MANIFOLD - R.R.

4. Replace the pipes concerned.

Parts & tools for this job For 2007 Fiat Bravo

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.