Chevrolet 17106681 Sensor,Throttle Position

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After completing the TPS maintenance, you should reconnect the cable to the negative battery terminal.

The Throttle Position (TP) Sensor is a potentiometer connected to the throttle shaft on the throttle body, providing a voltage signal that changes with the throttle blade angle. The PCM calculates throttle position based on this signal, and fuel delivery is adjusted accordingly. Testing involves checking the connector for damage, measuring voltage at Terminal B (around 0.5 volts), smoothly operating the throttle to WOT (voltage should follow without exceeding 5 volts), and checking for proper ground and 5-volt reference signals. Removal of the TP sensor requires disconnecting the negative battery cable, removing the air cleaner, TP sensor connector, and TP sensor mounting bolts, followed by installing a new 0-ring on the TP sensor and reassembling. For the 4.6L engine, the throttle body assembly must be removed, and then the TP sensor can be detached, with the 0-ring discarded and a new one installed before reassembly.

The CMFI or CSFI unit precisely controls fuel delivery to the engine, located centrally in the lower intake manifold. Key differences include the CMFI system with an adjustable aluminum air intake plenum and a single non-serviceable fuel injector unit, while the CSFI system has a non-adjustable air intake plenum, six individually controlled fuel injectors, and incorporates a Mass Air Flow sensor. The PCM monitors various engine parameters via sensors and energizes the fuel pump briefly upon ignition. Fuel is supplied by a high-pressure electric pump in the fuel tank, regulated by a fuel pressure regulator. The throttle valve controls air flow, with additional air regulated by the Idle Air Control valve. Fuel is supplied to cylinders through tubes with poppet nozzles. Upper intake manifold removal involves multiple steps, including disconnecting the battery, relieving fuel pressure, removing components, and disconnecting various connectors and hoses. Installation is the reverse of removal. The CMFI and CSFI fuel injection units are removed following a similar process, involving battery disconnection, fuel pressure relief, and removal of related components. Fuel injectors are checked and replaced if needed. The Idle Air Control (IAC) valve controls idle speed and is checked for resistance and operation. Removal and installation steps are provided, including resetting the IAC valve. The intake manifold tuning valve (CMFI) is checked and replaced as needed. Fuel injector replacement (CSFI) includes removing and reinstalling the fuel meter body. The fuel pressure regulator (CSFI) is replaced following specific steps, including O-ring replacement. Throttle body removal and installation (CSFI) involves disconnecting various components and ensuring proper cable operation. Throttle Position Sensor (TPS) checks are detailed, and replacement steps include backprobing, mounting screw removal, and proper alignment during installation.

To perform maintenance procedures on the throttle body assembly, start by relieving system fuel pressure and disconnecting the battery's negative terminal. Next, remove the air cleaner housing assembly, adapter, and gaskets. Regarding the Fuel Meter Cover/Fuel Pressure Regulator Assembly, unplug the electrical connectors to the fuel injectors and remove the long and short fuel meter cover screws to take off the fuel meter cover. Remove the fuel meter outlet passage gasket, cover gasket, and pressure regulator seal, and clean the cover if necessary. Install new gaskets and seal, and then reinstall the fuel meter cover assembly using Loctite 262 on the screws. Reattach the electrical connectors to both injectors and the battery cable, checking for leaks with the engine off and the ignition on before reinstalling the air cleaner housing assembly, adapter, and gaskets. For the Fuel Injector Assembly, unplug the electrical connectors from the fuel injectors, remove the fuel meter cover/pressure regulator assembly, and use a screwdriver to carefully pry out the injectors. Remove the upper and lower O-rings and filter from the injector and inspect for dirt and contamination. Replace the injector with an identical part, slide the new filter into place, lubricate and install the new O-rings, and then push the injector into the fuel meter body. Reinstall the fuel meter cover assembly and gasket, the battery cable, and check for fuel leaks. Attach the electrical connectors to the fuel injectors and install the air cleaner housing assembly, adapter, and gaskets. For the Throttle Position Sensor (TPS), remove the TPS and reinstall it on the throttle body, aligning the TPS lever with the TPS drive lever, and secure it with attaching screws and retainers. Reinstall the air cleaner housing assembly, adapter, and gaskets, and attach the battery cable. To remove the Idle Air Control (IAC) valve, unplug its electrical connector and use an adjustable wrench to remove the valve. Remove and discard the old IAC valve gasket, clean the throttle body surface, and check the pintle dimensions. Adjust the pintle if necessary and install the new gasket before reinstalling the IAC valve and securing it to the specified torque. Reconnect the electrical connector and install the air cleaner housing assembly, adapter, and gaskets. For the Fuel Meter Body Assembly, unplug the electrical connectors from the fuel injectors and remove the fuel meter cover/pressure regulator assembly, gaskets, and seals. Remove the fuel injectors, unscrew the fuel inlet and return line threaded fittings, and detach the lines, removing the O-rings. Remove the fuel inlet and outlet nuts and gaskets, then install a new throttle body-to-fuel meter body gasket and place the fuel meter body assembly on the throttle body. Coat the fuel meter body-to-throttle body attaching screws with thread locking compound before tightening them. Install the fuel inlet and outlet nuts with new gaskets, the fuel inlet and return line threaded fittings with new O-rings, and check for leaks. Reinstall the air cleaner housing assembly, adapters, and gaskets. Finally, for the Throttle Body Assembly, unplug all electrical connectors, detach the throttle linkage, return spring(s), transmission control cable (automatics), and cruise control if equipped, and label and detach vacuum hoses. Using a backup wrench, remove the inlet and outlet fuel line nuts and remove the fuel line O-rings, followed by the TBI mounting bolts to lift the TBI unit from the intake manifold, removing and discarding the TBI manifold gasket. Place the TBI unit on a holding fixture if available or be cautious if working directly on a workbench. Remove the fuel meter body-to-throttle body attaching screws, the old throttle body-to-fuel meter body gasket, the TPS, and invert the throttle body to remove the IAC valve. Clean the throttle body assembly, inspect mating surfaces, and reinstall the IAC valve and TPS. Install a new throttle body-to-fuel meter body gasket and place the fuel meter body assembly on the throttle body, securing it with thread locking compound on the attaching screws. Install the TBI unit with a new TBI-to-manifold gasket and new O-rings on the fuel line nuts. Reattach vacuum hoses, throttle linkage, return spring(s), transmission control cable (automatics), cruise control cable, and the grommet with wire harness to the throttle body. Plug in all electrical connectors, connect the negative battery cable, and check for fuel leaks with the engine off and the ignition on. Adjust the minimum idle speed and check the TPS output. Reinstall the air cleaner housing assembly, adapter, and gaskets to complete the maintenance procedures.

To test the TPS operation, reconnect the connector and back probe the dark blue wire terminal. Gradually open the throttle and the voltage should increase smoothly. If incorrect, replace the TPS.

The Throttle Position Sensor (TPS) is a variable potentiometer connected to the end of the throttle shaft on the throttle body. It monitors the output voltage to determine fuel delivery based on throttle valve angle. A broken or loose TPS can cause intermittent bursts of fuel and an unstable idle. The TPS is located on the side of the throttle body. Check the terminals and wires for looseness or breaks. Before checking the TPS, ensure the voltage supply and ground circuits are functioning correctly. Disconnect the electrical connector and check the voltage, which should read approximately 5.0 volts. If incorrect, check the wiring. To test the TPS operation, reconnect the connector and back probe the dark blue wire terminal. Gradually open the throttle and the voltage should increase smoothly. If incorrect, replace the TPS. To replace the TPS, access it by removing the necessary components. Disconnect the electrical connector and remove the mounting screws. Install a new O-ring and align the TPS with the throttle shaft before tightening the screws.

The vehicle speed sensor (VSS) provides speed data to the PCM. To check it, you can check for reference voltage.

The intake air temperature (IAT) sensor acts as a thermistor. To check it, you can measure its resistance at different temperatures to ensure it changes as expected. Additionally, you should monitor the IAT sensor using a scan tool to verify its performance.

Yes, this should come with the necessary gasket/0-ring needed to ensure proper connection