Engine knocking
- Make
- Alfa Romeo
- Model
- Brera and Spider Factory Service Manual
- Year
- 2005–2010
- Section
- Noise / vibrations › Engine knocking
ENGINE KNOCKING
The customer complains of: Irregular combustion noise, engine knock
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Check that the engine oil level is correct Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Check the operation of the low pressure supply circuit by carrying out the | Move on to Step 1 | Oil level incorrect | Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY | |
| 1 | AMBIENT PARAMETERS CHECK | All OK | Problems encountered | Operation |
Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit. Check the value of the following parameters: . Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK . Atmospheric pressure See Test 1060GD ATMOSPHERIC PRESSURE CHECK . Air temperature in the intake manifold See Test 1064BD SUPERCHARGING TEMPERATURE CHECK . Supercharging pressure Objective . Supercharging pressure Measured See Test 1060GF . Measured air mass See Test 1060GG MEASURED AIR MASS CHECK . Engine coolant temperature See Test 1060OE CHECK ON OPERATION OF COOLANT TEMPERATURE SENSOR . Diesel temperature See Test 1060EA DIESEL FUEL TEMPERATURE CHECK . Objective Diesel pressure . Measured Diesel pressure See Test 1060GH DIESEL FUEL PRESSURE CHECK . Engine rpm | Move on to Step 2 | |||
| 2 | PREHEATING RELAY ACTIVE DIAGNOSIS | All OK | Problems encountered | Operation |
Carry out the active diagnosis for the preheating relay, checking that the result is positive. The check on the following system is only necessary if the outside temperature is below 0 °C. | End of diagnosis | The result of the active diagnosis is negative | Move on to Step 3 | |
| 3 | HEATER PLUGS CHECK | All OK | Problems encountered | Operation |
Check that the heater plugs are working properly | End of diagnosis | |||
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