Vehicle fuel system Toyota 4Runner 2 (N120)

Fuel and exhaust systems — general description
The fuel system consists of: fuel tank; electric fuel pump (mounted inside the fuel tank); main injection system relay and fuel pump relay; injectors; pressure regulator; air filter; throttle body. All vehicles covered...

Technical data of the fuel system
Fuel pressure Ignition on, engine not running 2.5 – 3.0 kgf/cm² Idle pressure: – the vacuum hose of the pressure regulator is disconnected 2.5 – 2.9 kgf/cm² – the regulator hose is connected 2.0 – 2.4 kgf/cm² Fuel...

Fuel system decompression procedure
1. Before repairing any part of the fuel system, it is necessary to relieve the fuel pressure to avoid fire and injury to service personnel. 2. Unscrew the filler cap. This will release the residual pressure in the...

Checking the fuel pump
Fuel pump wiring diagram 1. Pump relay; 2. Pump; 3. Processor unit; 4. STA signal; 5. NA signal 6. From the crankshaft speed sensor; 7. P/N switch on automatic transmission; 8. Auxiliary starter relay; 9. Battery 1....

Checking fuel pressure
Pressure gauge connection points A. On a 2.7L engine: 1. Fuel supply pipe; 2. Gasket; 3. Pressure test kit B. Location of fuel regulator and distributor on V6 3.4L engines: arrow indicates plug 1. To perform the...

Checking the fuel pressure regulator
Location of the regulator on 4-cylinder engines 1. Regulator 2. Vacuum hose 3. Return hose 1. Disconnect and plug the fuel pressure regulator vacuum hose. Connect a hand vacuum pump to the regulator. Start the engine...

Main Fuel Injection System (EFI) relay and fuel pump relay
Checking the main injection relay A. There must be a circuit between the terminals B. Gap 1. The fuel system electrical circuit includes two relays - the EFI relay and the pump relay. The EFI relay is mounted in the...

Hoses and connections — checking and replacing
Connecting the hose to the tube 1. Hose 2. Clamp Check and replace 1. Replace fuel hoses and tubes if cracks, dents, or worn rubber are detected. 2. Decompress before replacing tubes and hoses. 3. Connect the hose to...

Fuel tank — removal and installation
Fuel tank and related parts 1. Ventilation tube; 2, 5. Gasket; 3. Shut-off valve; 4. Neck; 6. Pillow; 7. Upper filler pipe; 8. Cover; 9. Cork; 10. Shield; 11. Tank mounting tape; 12. Neck hose; 13. Tube; 14. Tank; 15....

Fuel pump — removal and installation
Fuel pump and related parts 1. Bracket; 2. Gasket; 3. Hose; 4. Pump; 5. Filter; 6. Spring ring; 7. Pillow; 8. Connector flange; 9. Connector; 10. Gasket; 11. Wire; 12. Fuel level indicator Removal 1. Perform...

Fuel level sensor — checking and replacement
Examination 1. Before checking the fuel level sensor, determine the true fuel level. 2. Remove the tank and take out the pump with the sensor. 3. Measure the resistance of the sensor with the float fully lowered (the...

Air filter — removal and installation
Air filter 1. Throttle position sensor connector; 2. Gasket; 3. Throttle position sensor; 4. Speed sensor connector; 5. Air filter with speed sensor; 6. Damper body; 7, 8. Coolant hose N4 and 5 Removal 1. Disconnect the...

Throttle Cable — Removal and Installation
Removal 1. Disconnect the battery from ground. 2. Loosen the locknuts of the cable end on the valve body. 3. Turn the throttle lever and remove the cable by threading it through the slot in the lever. 4. Disconnect the...

Electronic Fuel Injection System (EFI system)
Electronic fuel injection system units for 4-cylinder engines 1. Crankcase ventilation valve; 2. Fuel distributor and injector; 3. Throttle angle sensor; 4. Recirculation sensor; 5. Equalization chamber; 6. Diagnostic...

Checking the EFI fuel injection system
1. Check all ground connections for tightness. Check system wiring and connectors. Loose electrical connections and poor ground connections can be the cause of many faults that are observed as serious failures. 2. Check...

Throttle Body — Checking and Replacing
4-cylinder engine throttle body 1. Crankcase ventilation valve; 2. Low gear acceleration cable; 3. Throttle cable; 4. Vacuum hose; 5. Hose of the tank with absorber; 6. Idle speed control connector; 7. Gasket; 8....

Fuel Pressure Regulator — Checking and Replacing
Regulator bolts and hoses (4-cylinder engine) 1. Pressure regulator; 2. Return hose; 3. Ring; 4. Control vacuum hose Pressure regulator on a V6 engine 1. Ring; 2. Pressure regulator; 3. Return hose; 4. Wiring harness...

Idle Air Control Valve (IAC) — Checking and Replacing
Attention! The engine idle speed is set by the manufacturer and when operating under normal conditions, their adjustment is not required. However, if the throttle chamber has been changed, or there is a suspicion that...

Fuel distributor and injectors — check and replacement
Examination Cm. subsection 5.10.1 . Replacement 1. Perform decompression. 2. Disconnect the battery from ground. 3. Disconnect the crankcase ventilation hose. 4. Remove the equalizing chamber. 5. Mark and disconnect the...

Surge chamber — removal and installation
Surge chamber and related parts (4-cylinder engines) 1. Recirculation tube; 2. Equalization chamber; 3, 13. Gasket; 4. Fuel line; 5. Comb; 6. Seal; 7, 17. Ring; 8. Nozzle; 9. Isolator; 10. Collector; 11. Rack; 12....

Exhaust system maintenance
Exhaust system of rear wheel drive vehicles 1. Ring; 2. End section; 3. Gasket; 4. Bracket; 5. Oxygen sensor 1; 6. Front pipe; 7. Limiter; 8. Front heat shield N1; 9. Front heat shield N₂; 10. Oxygen sensor 2 To replace...

Exhaust gas toxicity reduction system
Mounting locations of typical emission control system units on a 2.7L 4-cylinder engine 1. Recirculation valve; 2. Vacuum valve controlling the recirculation valve; 3. Vacuum distributor controlling the recirculation...

Technical data of the exhaust emission control system
Oxygen sensor heater resistance Cars "Toyota 4 Runner/ Hilux/ Surf" 1996. 11 – 16 Ohm Cars "Toyota 4 Runner/ Hilux/ Surf" since 1997. 11 – 16 Ohm Resistance of the temperature sensor of the recirculation system at 45°C...

Location of toxicity reduction system devices
1996 2.7L Emission Control and Fuel System Component Locations 1. Throttle position sensor; 2. Recirculation system temperature sensor; 3. DLC3 connector; 4. Ignition switch; 5. Gasoline vapor pressure sensor; 6....

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