Fuel supply system, petrol engines

Chapter overview

• Technical data
  1
• 1 Identification
  1
• 1.1 Engine number/engine data
  1
• 2 Safety information
  5
• 2.1 Safety precautions when working on vehicles with a gas system
  5
• 2.2 Safety regulations for working on fuel supply
  6
• 2.3 Crash fuel shut-off
  7
• 3 General information
  8
• 3.1 Rules for cleanliness when working on fuel supply system
  8
• 3.2 General notes on fuel system
  9
• Fuel supply system
  11
• 1 Fuel
  11
• 1.1 Assembly overview - fuel tank
  11
• 1.2 Emptying fuel tank
  13
• 1.3 Removing and installing fuel tank
  16
• 1.4 Releasing high pressure in fuel system
  19
• 2 Fuel delivery unit, fuel gauge sender
  20
• 2.1 Removing and installing fuel delivery unit, fuel gauge sender
  20
• 2.2 Removing and installing fuel gauge sender G
  22
• 3 Plug-in connectors
  24
• 3.1 Separating plug-in connectors
  24
• 4 Fuel filter
  30
• 4.1 Assembly overview – fuel filter
  30
• 4.2 Removing and installing fuel filter
  31
• 5 Activated charcoal filter system
  34
• 5.1 Function
  34
• 5.2 Assembly overview – activated charcoal filter system
  34
• 5.3 Checking fuel tank breather
  35
• 6 Accelerator pedal
  41
• 6.1 Function of the electronic throttle
  41
• 6.2 Assembly overview - accelerator module
  41
• 7 Fuel supply
  47
• 7.1 Checking fuel pump (vehicles model years ► 2005), engine codes BCA, BUD
  47
• 7.2 Checking fuel pump (vehicles model year 2006 ►), engine codes BCA, BUD
  55
• 7.3 Checking fuel pump, engine codes BGU, BSE, BSF
  64
• 7.4 Checking fuel pump, engine codes CBZA, CBZB
  82
• 8 Removing and installing parts of fuel supply system (natural gas)
  92
• 8.1 Natural gas system components
  92
• 8.2 Natural gas system components, Caddy Maxi
  94
• 8.3 Assembly overview - natural gas tank with attachments
  96
• 8.4 Assembly overview - natural gas tank with attachments
  98
• 8.5 Assembly overview - protective covers
  100
• 8.6 Assembly overview - protective covers, Caddy Maxi
  100
• 8.7 Removing and installing fuel tank (natural gas)
  101
• 2 N362
  114
• 4 N429
  115
• 8.10 Removing and installing solenoid from tank shut-off valve 5 N430 (Caddy Maxi )
  117
• 8.11 Removing and installing fuel tank shut-off valve
  118
• 8.12 Removing and installing filling connection
  121
• 8.14 Testing for leaks
  126
• 8.15 Removing and installing tank pressure sensor G400
  127
• 8.16 Evacuating natural gas tank
  128
• 8.17 Evacuating fuel tank, securing solenoid with securing clip
  130
• 8.18 Evacuating fuel tank, securing solenoid with securing nut
  132
• 9 Parts of the gas supply system
  135
• 9.1 Assembly overview - emptying fuel tank (LPG)
  135
• 9.2 Filter for LPG system: renew
  138
• 9.3 Removing and installing fuel tank (LPG)
  142
• 9.4 Components on the fuel tank (LPG)
  145
• 9.5 Removing and installing gas injector
  152
• 9.6 Removing and installing gas rail temperature and pressure sensor GX21
  153