| When working on the fuel supply/injection system, pay careful attention to the following “5 rules” of cleanliness: |
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| Thoroughly clean all unions and the adjacent areas before disconnecting |
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| Place dismantled parts onto a clean surface and cover them. Use lint-free cloths! |
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| If repairs cannot be completed in one session, all parts and components that are left open should be covered or stored with the greatest of care |
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| Only install clean components: |
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| Only unpack replacement parts immediately prior to installation. |
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| Do not use parts that have been stored loose (e.g. in toolboxes, etc.). |
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| When the system is open: |
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| Do not work with compressed air if this can be avoided |
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| Do not move vehicle unless absolutely necessary |
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