Question 1

How to install the fuel injector assembly on Toyota Sequoia?

Accepted Answer

Start the fuel injector assembly installation for the 2UZ-FE engine by treating each new O-ring with a small drop of gasoline then placing one on each injector before inserting the 8 injectors onto the delivery pipes by turning them clockwise and counterclockwise while orienting the injector connectors outward. Fit the intake manifold with 8 new insulators before setting the 2 delivery pipes and injector assemblies onto the lower intake manifold while temporarily securing its 4 nuts. Use the specified components to assemble the No. 1 fuel pipe sub-assembly by installing the bolt along with 4 new gaskets, 2 union bolts, torquing the union bolts to 39 Nm (398 kgf-cm, 29 ft-lbf) and the bolt to 7.5 Nm (76 kgf-cm, 66 in-lbf). The installation of the fuel return pipe with 3 bolts reaches a torques of 7.5 Nm (76 kgf-cm, 66 in-lbf) while the fuel return hose connects to the fuel pressure regulator. Inspection of the injectors should verify their smooth rotation but if any injector fails to rotate properly the O-ring of that defective injector needs replacement. Secure the lower intake manifold delivery pipes with 4 nuts fastened to 21 Nm torque while attaching the 8 injector connectors. The engine wire gets its clamps installed onto the brackets found on the right-hand delivery pipe. Next the clamps are connected to both the No. 1 engine hanger and engine wire bracket before attaching the engine wire protector through two bolts. Connect the No. 2 fuel pipe sub-assembly with a secure connection until the "click" sound is detected then confirm that no damage or foreign objects exist in the connectors prior to and after completion. The installation sequence should be repeated on the No. 1 fuel pipe sub-assembly. Attaching the EFI fuel pipe clamp requires installation of 2 throttle body cover brackets with 2 bolts that need torquing to 7.5 Nm (76 kgf-cm, 66 in-lbf). Secure the No. 2 ventilation hose to the ventilation valve followed by a connection of the hose assembly to the air cleaner and the throttle body cover sub-parts. Finally, inspect for fuel leaks.

Question 2

How to remove the fuel injectors on Toyota Sequoia?

Accepted Answer

One must drain pressure from the fuel system before starting the fuel injectors removal procedure on a 2UZ-FE engine. The riddle begins by taking off the throttle body cover sub-assembly along with disconnecting the air cleaner hose assembly. The first step involves detaching the No. 2 ventilation hose from the ventilation valve and afterward removing the throttle body cover bracket by unfastening its two bolts. Detach the EFI fuel pipe clamp before disconnecting the No. 2 fuel pipe sub-assembly while inspecting both the pipe and connection area for foreign particles followed by cleaning procedures and abstaining from using tools for pipe and connector separation. You should perform the same investigation on the No. 1 fuel pipe sub-assembly. The engine wire clamps need removal from both the No. 1 engine hanger and engine wire bracket as well as from the delivery pipe's two brackets. Begin disassembling the fuel delivery pipe by removing the fuel return hose from the fuel pressure regulator then placing a cloth under the regulator and then taking out the 3 bolts along with the fuel return pipe from the delivery pipe and intake manifold. The engineer will move the fuel return pipe to expand their working area before carefully dismantling the bolt and union bolts and removing 4 gaskets and the No. 1 fuel pipe sub-assembly. Separate the 8 injection connectors while removing the 4 manifold-intake delivery pipe nuts and then extract the 2 delivery pipes as you prevent injector drops. Extract the 8 injectors from the delivery pipe by following the procedure which includes no horizontal stress on the injectors and separate each injector from its O-ring and insulator.

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