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Volkswagen Workshop Service and Repair Manuals

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Rules for cleanliness > < Dismantling and assembling fuel rail

Golf Mk4

Simos injection and ignition system
Servicing injection system
Safety precautions
Warning!
The fuel system is pressurized! Before loosening hose connections or opening the test connection, wrap a cloth around the connection. Then release pressure by carefully pulling off the hose or carefully unscrewing sealing plug.

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.
  • ◆ The ignition must be switched off before connecting or disconnecting injection or ignition system wiring or tester cables.

Vehicles 05.98▸

  • ◆ For safety reasons the fuse No. 28 must be removed from the fuse holder before opening the fuel system, otherwise the fuel pump can be activated by the door contact switch.
  • ◆ If the engine is to be turned at starter speed, without starting, e.g. when checking compressions, pull connector off output stage:
 
N28-0093
  • ‒ → Pull 4 pin connector -1- off output stage for ignition coils -2-.

Observe following if test and measuring instruments are required during a test drive:

  • ◆ Test and measuring instruments must be secured to rear seat and operated by a 2nd person from this location.
  • If test and measuring instruments are operated from front passenger's seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered.

Rules for cleanliness > < Dismantling and assembling fuel rail