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ELECTRIC FUEL PUMP(S) Fuel under pressure from electric fuel pump flows through a fuel damper, fuel filter, injector fuel rail and fuel pressure regulator. ELECTRONIC CONTROL UNIT (ECU), Fig. 1: Hot Wire Airflow Meter (Typical), AIR TEMPERATURE SENSOR, HROTTLE POSITION SENSOR (TPS), ELECTRICAL RELAYS, COLD START INJECTOR. THROTTLE POSITION SENSOR Removal & Installation 1) Disconnect negative battery cable. Unplug TPS electrical connector. Remove 2 screws securing TPS to housing. Remove by slowly pulling sensor off throttle shaft.
2) To install, reverse removal procedure. Make sure sensor is aligned on throttle shaft and after replacement, perform TPS adjustment. See ADJUSTMENTS in this article. FUEL INJECTORS Removal 1) Release fuel system ressure and disconnect negative battery cable. Drain cooling system. Clear fuel rail and intake air chamber by disconnecting all air hoses, coolant hoses, vacuum hoses, and fuel hoses. 2) Remove EGR valve and pipe and intake air duct. Remove intake air chamber and support bracket. Disconnect fuel injection wiring harness from all connectors near fuel rail and place harness on top of engine.
Tags : throttle position sensor, electric fuel pump, fuel pressure regulator, negative battery cable, coolant hoses, electronic control unit, airflow meter, throttle shaft, fuel injection system, toyota celica, cable drain, vacuum hoses, sensor tps, ressure, fuel rail
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