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| Disconnect injection valve connections. |
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| Loosen the fuel distributor fastening screws. |
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| Remove vacuum hose from fuel pressure regulator. |
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| Remove fuel distributor with intake injector valves of the manifold (lower part), and support them. |
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| Activate the actuator element diagnosis and activate the Cylinder 1 injector -N30-: → Troubleshooting. |
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| Then, check injection valves for tightness with the Fuel pump (pre-supply pump) -G6- running. Any leak of more than 2 drops/min may not occur. |
| If the fuel loss is greater: |
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| Replace the defective injection valve. |
| Install in reverse removal order. Please note the following: |
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| Sealing rings in all injector valves must be replaced and slightly lubricated with clean engine oil before installation. |
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| The injection valves shall be installed vertically on the fuel distributor and fastened with clips. |
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| Position fuel distributor with locked injection valves in the intake manifold (lower part), and press uniformly. |
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