OEM 2007 Toyota Sienna Fuel Injector

2007 Toyota Sienna Parts Questions & Experts Answers

• Q: How to service and repair the fuel injector on 2007 Toyota Sienna?

  A: Service and fuel injector repair starts by using a fuel system pressure discharger then disconnecting the negative battery terminal cable. Start by removing the engine under cover near No. 1 and draining engine coolant after which the front wiper arm head cap should be taken off followed by right and left front wiper arms. The service begins with removing the cowl top ventilator louver sub-assembly, windshield wiper motor and link assembly, and the No. 1 cowl top to cowl brace inner by removing 2 bolts. You can remove the cowl top panel sub-assembly outer front when you unclip the wire harness clamp and disconnect the fuel pump resistor connector and take out the 7 bolts. Disassemble the V-bank cover sub-assembly along with the air cleaner cap sub-assembly by disconnecting three vacuum hoses together with the No. 2 ventilation hose, EVAP vacuum hose, and two bolts. To remove the intake air surge tank assembly start by disconnecting the 2 water by-pass hoses combined with the fuel vapor feed hose assembly and the throttle with motor body assembly connector as well as the No. 1 ventilation hose and the union to check valve hose followed by the connector before using a 5 mm socket hexagon wrench to remove the 4 bolts and take off the 2 nuts and 2 bolts which enable the removal of the intake air surge tank. Detaching the fuel tube sub-assembly starts with unclipping the No. 2 fuel pipe clamp and gently pulling out the fuel pipe while maintaining the quick connector from external dirt entry. Start by disconnecting the 6 fuel injector connectors followed by removing 5 assembly bolts and extracting the fuel delivery pipe sub-assembly with attached 6 fuel injectors then remove 6 injector vibration insulators before finally pulling out fuel injectors from the fuel delivery pipe sub-assembly and completing the removal by removing 6 O-rings. The installation process requires new O-rings to be coated lightly with spindle oil or gasoline before placement on each injector while the same solution is applied to the fuel delivery pipe contact points followed by pushing the fuel injector during installation by rotation until proper alignment with outward facing connectors. Position the new 6 insulators inside the intake manifold after installing the fuel delivery pipe which contains 6 fuel injectors. Secure the 5 bolts only temporarily before tightening them to 21 Nm (214 kgf.cm, 15 ft. lbs.). Connect the 6 fuel injector connectors before inserting the pipe tube connector which will activate the click function until tightening the No. 2 fuel pipe clamp. The installation of a new gasket to the intake air surge tank assembly requires a 5 mm hexagon socket wrench to tighten the 4 bolts at 18 Nm (184 kgf.cm, 13 ft. lbs.) torque. Afterwards, install the assembly with its 2 nuts and 2 bolts while tightening the nuts to 16 Nm (163 kgf.cm, 12 ft. lbs.) and bolts to 21 Nm (214 kgf.cm, 15 ft. lbs.). The procedure requires the assembly of necessary hoses and connectors with installation of the air cleaner cap sub-assembly alongside engine coolant addition followed by negative battery terminal reconnection before leak inspection and reinstatement of the components including the No. 1 engine under cover at specified torque. Wipe up the remaining parts by first installing the windshield wiper motor and links and finally adding front wiper arms.