3233208 - X01 EXCESSIVE FUEL CONSUMPTION
The engine appears to run smoothly, but the fuel consumption is higher than previously recorded during the life of the vehicle. | The consumption data in the vehicle technical documentation has been defined during the course of homologation tests in accordance with the directive in force. These tests simulate an urban cycle and an average extra-urban cycle and therefore may not be indicative as consumption depends very much on the style of driving. |
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
| Check the condition of the air filterCheck the state of the spark plugs | Continue to Step 1 | Filter element dirty or damaged | Replace the filter element Op. 1048A14 | |
| Spark plugs dirty or damaged | Replace the spark plugs Op. 5510D10 | |||
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect
diagnostic equipment (Examiner or other instruments) to the diagnostic
socket. Verify:
| Continue to Step 2 | An error is detected 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 E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 2 | CHECK ON FUEL INJECTORS | All OK | Problems met | Operation |
| Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors. | Continue to Step 3 | Injector connections faulty | Restore the connection of the injectors with the control unit, See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |
| Injectors faulty | Replace injectors Op. 1056B70 | |||
| 3 | CHECKING FUEL PRESSURE | All OK | Problems met | Operation |
| Check the fuel supply pressure Op. 0510C10 | Continue to Step 4 | Pressure not correct (too high a pressure is indicative of excessive consumption) | Replace the fuel pump assembly Op. 1040A70 | |
| 4 | CHECKING AIR CIRCUIT | All OK | Problems met | Operation |
Verify:
| Continue to Step 5 | Circuit component damaged | Replace component (See Assembly 1048A) | |
| 5 | CHECKING TIMING | All OK | Problems met | Operation |
| Check that the engine timing is correct | Continue to Step 6 | Timing not correct | Restore the correct timing Op. 1032B14 | |
| 6 | 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' | |