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Rules for cleanliness > < Servicing Simos injection system
Simos Injection and Ignition System (4-cylinder)
Servicing Simos injection system
Safety precautions
Important!
The fuel system is pressurised. Before loosening hose connections or opening the test connection (to measure fuel pressure), place a cloth around the connection. Then release pressure by carefully pulling off the hose or cap.

To prevent injuries to persons and/or damage to the fuel injection and ignition system, the following must be noted:

  • ◆ Do not touch or disconnect ignition wiring when the engine is running or being turned at starter speed.
  • ◆ Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables.
  • ◆ To run the engine at starting speed without actually starting it (for example, in order to test compression), unplug the connector from the output stage of the ignition coils and also the connectors on the injectors. After completing the work, interrogate the fault memory and erase it.
  • ◆ Always switch off the ignition before cleaning the engine.
  • ◆ Always switch off the ignition before connecting or disconnecting the battery, otherwise the engine control unit may be damaged.

Rules for cleanliness > < Servicing Simos injection system