How to Replace Fuel Injectors in Toyota Cars

by Contributing Writer; Updated June 12, 2017

This engine uses sequential fuel injection, which requires the fuel injectors to deliver fuel to the engine under high pressure. The fuel injectors for a Toyota car engine are on top of the engine, and are accessible from the engine compartment. The replacement of the fuel injectors in this engine requires the removal of additional engine components.

Under The Hood:

 How to Replace Fuel Injectors in 1ZZ FE

Remove the fuel pump fuse from the fuse box under the dashboard. Start the engine and allow the engine to stall. Crank the engine to ensure the fuel lines are empty and replace the fuel pump fuse. Disconnect the cable from the negative battery terminal to prevent the battery from generating sparks during the fuel injector replacement.

Disconnect the cover for the No. 2 cylinder head with a socket wrench. Detach the vacuum hose and fuel tube from the fuel pipe. Disconnect the electrical connectors from the fuel injectors.

Disconnect the fuel pipe from the fuel injectors and detach the fuel injectors from the engine. Remove the spacers from the cylinder head and pull the fuel injectors away from the fuel pipe. Discard the O-ring and grommet for the fuel injectors.

Coat the new O-rings and grommets with light machine oil before installing them onto the new fuel injectors. Coat the mounting surfaces on the fuel pipe with light machine oil. Install the new fuel injectors into the fuel pipe by twisting them into place so that the electrical connectors face away from the fuel pipe. Coat the injector bores in the cylinder head with light machine oil.

Install the spacers and connect the fuel pipe to the cylinder heads. Tighten the mounting bolts for the fuel pipe to 14 foot-pounds with a torque wrench. Attach the fuel line and the PCV hose to the fuel pipe. Connect the cover for the No. 2 cylinder head and tighten its mounting bolts to 7 foot-pounds. Connect the cable for the negative battery terminal with a socket wrench.

Items you will need

  • Socket wrench set

  • Light machine oil

  • Torque wrench

 How to Replace a Fuel Injector in a Toyota Camry

Determine which fuel injector your Toyota Camry will need. This depends not only on the make and model, but also the engine size. Models made from 1982 to 1986 have a 1.8L or 2.0L engine. Models built from 1987 to 1993 have a 1.8L, 2.0L or 2.5L engine and 1994 to 1998 models can be equipped with a 1.8L, 2.0L or 2.2L engine.

Look at late models of the Toyota Camry. Models made from 1997 to 2001 can be equipped with a 2.2L or 3.0L engine, and 2002 to 2006 models can have a 2.4L, 3.0L or 3.3L engine. The current generation of the Toyota Camry has been available since 2007 and is offered with a 2.4L or 3.5L engine.

Disconnect the negative battery cable with a socket wrench and relieve the fuel system pressure. Remove the air intake assembly and the engine cover. Use a socket wrench to detach the fuel tube assembly and lift out the fuel delivery pipe with the injectors still attached. Pull the fuel injectors out of the fuel rail and discard the old O-rings.

Coat the new O-rings with gasoline and install the new fuel injectors into the fuel rail while ensuring they can turn freely in place. Use a torque wrench to tighten the fuel rail retaining bolts 15 foot pounds.

Complete the rest of the installation by reversing the removal process and start the engine to check for fuel leaks.

Items you will need

  • Fuel injector kit

  • Socket wrench set

  • Torque wrench

 How to Replace a Fuel Injector in a Toyota Corolla

Determine which fuel injector your Toyota Corolla will need. This depends not only on the make and model, but also the engine size. Models made from 1966 to 1970 have a 1.1L or 1.2L engine. Models built from 1970 to 1978 have a 1.2L, 1.4L or 1.6L engine. Models made from 1979 to 1987 may be equipped with a 1.3L, 1.6L or 1.8L diesel engine.

Look at later versions of the Toyota Corolla. Models manufactured from 1988 to 1992 include a 1.3L, 1.5L, 1.6L or 2.0L diesel engine. Models made from 1993 to 1997 also offer a 1.8L engine. Models built from 1998 to 2005 in the United States were available only with a 1.8L engine.

Examine the latest generation of the Toyota Corolla. It debuted in 2006 and is available with a 1.5L, 1.8L or 2.4L engine.

Relieve the fuel system pressure and disconnect the negative cable to the battery with a socket wrench. Remove the air cleaner and disconnect the bracket for the accelerator cable from the throttle body with a socket wrench. This will allow you to detach the throttle body from the air intake chamber.

Remove the engine hanger and exhaust gas recirculation assembly with a socket wrench, if present. You will now be able to take off the cover for the air intake chamber and gasket. Detach the electrical connections for the fuel injectors and the fuel lines. Use a socket wrench to take the fuel rail assembly off the intake manifold, including the insulators and collars.

Coat each new O-ring lightly with gasoline and place it on the new fuel injector. Install the new fuel injector and ensure it can rotate smoothly in both directions.

Complete the installation by reversing the removal steps. Use a torque wrench to tighten both fuel rail mounting bolts to 11 ft. lbs. Torque the bolt for the fuel inlet pipe to 22 foot pounds and use an X-pattern to torque the throttle body mounting bolts to 16 foot pounds.

Items you will need

  • Fuel injector kit

  • Socket wrench set

  • Torque wrench

 How to Replace a Fuel Injector in a Toyota Tundra

Determine which fuel injector your Toyota Tundra will need. This depends not only on the make and model, but also the engine size. Models made from 2005 to 2006 offer options for a 4.0L or 4.7L engine. The current version is available with 4.0L, 4.7L and 5.7L engines.

Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench. Drain the engine coolant and remove the V bank cover.

Remove the air cleaner assembly and the intake manifold with a socket wrench. Disconnect the fuel lines and plug them to prevent leaking.

Disconnect the fuel injector electrical connectors and use a socket wrench to remove the six mounting bolts for the fuel rail. Lift the fuel rail away from the engine compartment with the injectors still attached. Pull the fuel injectors out of the fuel rail and discard the old gaskets and O-rings.

Install the new fuel injectors by reversing the removal procedure. Use new gaskets and O-rings, and fill the cooling system with coolant of the proper grade and type.

Start the engine and check for fuel leaks.

Items you will need

  • Engine coolant

  • Fuel injector kit

  • Socket wrench set

 How to Replace a Fuel Injector in a Toyota Tacoma

Determine which fuel injector your Toyota Tacoma will need. This depends not only on the make and model, but also the engine size. Models made before 2005 may have a 2.4L, 2.7L or 3.4L engine. The current version may have a 2.7L or 4.0L engine.

Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench. Remove the engine under cover subassembly and drain the engine coolant. Detach the intake air connector and disconnect the throttle body motor assembly with a socket wrench.

Disconnect the fuel lines and remove the fuel pressure pulsation damper assembly with a socket wrench. Unplug the electrical connectors for the fuel and vacuum switching valve. Remove the engine wiring harness clamp and the air conditioning compressor clutch connector with a socket wrench.

Remove the two fuel rail mounting bolts with a socket wrench and lift out the fuel rail with the injectors still attached. Pull out the fuel injectors and discard the old gaskets.

Use new gaskets and install the new fuel injectors by reversing the removal procedure.

Fill the coolant reservoir with coolant of the proper grade and type. Start the engine and check for fuel leaks.

Items you will need

  • Engine coolant

  • Fuel injector kit

  • Socket wrench set