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Dismantling and assembling fuel rail with injectors > < General notes on injection

Golf Mk3

Motronic injection and ignition system
Servicing injection system
Removing and installing parts of the injection system
 
N24-0294
  • To warm air intake
    • ◆ To warm air collecting plate on exhaust manifold
  • To oil separator
  • Air cleaner
    • ◆ Removing ,
      Fig. 2
    • ◆ Dismantling and assembling => Page 24-15
  • Connector
    • ◆ 4-pin
    • ◆ For intake manifold pressure sender (G71) with intake air temperature sender (G42)
  • Connector
    • ◆ 8 pin
    • ◆ For throttle valve control part (J338)
 
N24-0294
  • Cable guide
    • ◆ Clipped on fuel manifold
  • 10 Nm
  • Fuel rail with injectors
    • ◆ Dismantling and assembling => Page 24-12
  • Return hose connection
  • Supply hose connection
  • To brake servo
  • Vacuum hose
  • Supply hose
    • ◆ Secure with spring-type clips on fuel manifold
    • ◆ Black or white markings
 
N24-0294
  • Return hose
    • ◆ Secure with spring-type clips on fuel manifold
    • ◆ Blue or blue markings
  • 20+1 Nm
    • ◆ Tighten bolts from inside to outside
    • ◆ Ensure tightening torque is correct, otherwise the intake manifold bushes will work into the cylinder head
  • Intake manifold
    • ◆ Dismantling and assembling => Page 24-13
  • O ring
    • ◆ Renew
  • Thermostat housing
  • O ring
    • ◆ Renew if damaged
 
N24-0294
  • Coolant temperature sender (G62)*
    • ◆ With coolant temperature gauge sender (G2)
    • ◆ Identification: yellow ring
    • ◆ If necessary release pressure in cooling system before removing
    • ◆ Checking
    • ◆ Resistance graph
      , Fig. 1
  • Connector
  • Retaining clip
  • Lambda probe (G39)*, 55 Nm
    • ◆ Location: In front exhaust pipe
    • ◆ Grease only the threads with "G5"; "G5" must not get into the slots on the probe body
    • ◆ Checking Lambda probe and Lambda control
      => Page 24-23
 
N24-0294
    • ◆ Checking probe heating voltage supply => Page 24-27
    • ◆ Check probe heating for continuity
  • 4 pin connector
    • ◆ For Lambda probe and Lambda probe heating
    • ◆ Secured to rear engine mounting on right, in direction of travel
  • To fuel tank
  • From fuel supply unit in fuel tank
  • Connector
    • ◆ Only disconnect or connect with ignition switched off
 
N24-0294
  • Engine control unit*
    • (Motronic control unit -J220)
    • ◆ For injection system, Lambda regulation, activated charcoal filter solenoid valve, knock control, governed speed, ignition and self-diagnosis
    • ◆ Location: in plenum chamber, right
    • ◆ Checking voltage supply => Page 24-59
    • If the control unit is replaced:
    • ◆ Perform basic settings => Page 24-21
    • ◆ Match control unit to electronic immobilizer => Page 24-61
  • Securing plate
  • 10 Nm

Dismantling and assembling fuel rail with injectors > < General notes on injection