A4 Mk3
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1 - | Fuel metering valve -N290- |
q | Do not unscrew |
2 - | High-pressure fuel pump |
q | With fuel metering valve -N290- |
q | On vehicles with engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB and CCLA, a first fuel filling operation MUST be performed after the high-pressure pump has been renewed (the pump must NOT be allowed to run while it is still empty) → Chapter |
q | On vehicles with engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB, and CCLA, the learnt values must be re-adapted after renewing the high-pressure pump or the fuel pressure regulating valve -N276-; see „Guided Functions“ in vehicle diagnostic tester |
q | High-pressure pump - exploded view, engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB, CCLA → Chapter |
q | Removing and installing, engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB, CCLA → Chapter |
q | High-pressure pump - exploded view, engine code CAPA → Chapter |
q | Removing and installing, engine code CAPA → Chapter |
3 - | Fuel rail |
q | Cylinder bank 1 |
4 - | Fuel pressure regulating valve -N276- |
q | On cylinder bank 1 |
q | Cannot be re-installed |
q | On vehicles with engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB, and CCLA, the learnt values must be re-adapted after renewing the high-pressure pump or the fuel pressure regulating valve -N276-; see „Guided Functions“ in vehicle diagnostic tester |
q | Removing and installing → Chapter |
5 - | Fuel pressure sender -G247- |
q | 30 Nm |
q | On cylinder bank 2 |
q | Removing and installing → Chapter |
6 - | Fuel rail |
q | For cylinder bank 2 |
7 - | Injectors |
q | Injectors 1 ... 6 |
q | Removing and installing → Chapter |
8 - | Fuel return lines (from injectors) |
q | The fuel return lines must not be dismantled; if necessary they must be renewed complete with pressure retention valve |
q | After replacement, engine must be run at idling speed for approx. 2 minutes to bleed fuel system. Then check fuel return lines for leaks |
9 - | Pressure retention valve |
q | The pressure retention valve maintains a residual pressure of approx. 10 bar in the fuel return lines. |
q | This residual pressure is required for the control function of the piezo injectors |
q | The pressure retention valve may only be renewed together with the fuel return lines |
q | After replacement, engine must be run at idling speed for approx. 2 minutes to bleed fuel system |
q | Checking pressure retention valve → Chapter |
10 - | Fuel cooler |
q | Fitted on underbody |
11 - | Fuel tank |
q | With fuel system pressurisation pump -G6- |
12 - | Preheating valve |
13 - | Supplementary fuel pump -V393- |
q | Only fitted on vehicles with engine codes CAMA, CAMB, CCWA, CCWB, CGKA, CGKB, CCLA |
14 - | Fuel filter |
q | Fuel filter - exploded view → Rep. gr.20 |
q | Renewing fuel filter → Rep. gr.20 |