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Rules for cleanliness > < Repairing Multi Point Fuel Injection system
MPFI Fuel Injection and Ignition System
Repairing Multi Point Fuel Injection system
Safety precautions
Attention:
The fuel system is pressurised! Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.

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 at starter speed.
  • ◆ Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables.
  • ◆ To operate the engine at starting speed without actually starting it (for example, to check the compression), unplug the connector from the power output stage for the ignition coils and the connectors from the injectors. After completing the work, interrogate the fault memory.
  • ◆ For assisted starts with a rapid charging unit the maximum permissible voltage is 16.5 V and the maximum charging time is 1 minute.
  • ◆ Always switch off the ignition before washing the engine.
  • ◆ Always switch off the ignition before connecting or disconnecting the battery, otherwise the engine control unit may be damaged.
  • ◆ Always use adapter set V.A.G 1594 A for connecting up measuring instruments (e.g. voltage tester V.A.G 1527 B, hand-held multimeter V.A.G 1526 A etc.)

Observe the following if testers and measuring instruments have to be used during test drives:

Attention:
  • ◆ Always attach testers and measuring instruments to the back seat and have a second person operate them from there.
  • ◆ Operation of testers and measuring instruments from the front passenger seat could result in injuries to the person sitting there in the event of an accident (activation of passenger's airbag).

Rules for cleanliness > < Repairing Multi Point Fuel Injection system