GMC 17106681 Sensor,Throttle Position

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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 component tightly controls fuel supply in the engine located at the lower intake manifold center. Among other features, a CMFI system has an adjustable aluminum air intake plenum and one non-serviceable fuel injector unit; while a CSFI system comes with non-adjustable air intake plenum, six individually controlled fuel injectors and it incorporates a Mass Air Flow sensor. The PCM tracks various engine parameters by means of sensors and energizes the fuel pump briefly upon ignition. Fuel is delivered into cylinders via poppet nozzles in tubes by a high-pressure electric pump found inside the tank of the fuel regulated by a pressure regulator of fuel. This is accomplished by an Idle Air Control valve that regulates additional air flow. Multiple steps must be taken for upper intake manifold removal such as disconnecting battery, relieving fuel pressure, removing components as well as disconnecting different connectors together with hoses. Installations are done inversely to their removals. A similar procedure which involves disconnection of battery, relief from pressure on fuels and also taking away related components is used to remove CMFI as well as CFIS fuel injection units (CMFI). Fuel Injectors are inspected for faults and replaced if necessary. Idle Air Control (IAC) Valve checks resistance and operation during idle speed control checkups. Several steps for removal and installation including resetting IAC Valve are provided in this respect. Intake Manifold Tuning Valve (CMFI) must be checked for replacement when necessary. Fuel Injector Replacement (CSFI) calls for detachment of the fuel meter body from its installation place back again into it after fixing it up (CSIF). The Fuel Pressure Regulator (CSFI) would be replaced following o-ring replacement among other specific steps. Throttle Body Removal/Installation (CSFI): Disconnect various components , ensure proper cable operation etc. In details, Throttle Position Sensor (TPS) checks involved backprobing, removal of mounting screws and alignment during installation.

Start by relieving system fuel pressure and disconnecting the battery's negative terminal to perform maintenance procedures on the throttle body assembly. After that, take off 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 both long and short fuel meter cover screws, to allow for removal of fuel meter cover. Then take out the cover if there is any dirt on it; additionally one should replace such seals as a fuel meter outlet passage gasket, pressure regulator seal or a cover gasket and then clean up its surface if necessary. Eventually install new gaskets and seal as well as put back the fuel meter cover assembly having used Loctite 262 on all screws. Reinstall the electrical connectors to injectors together with battery cable while checking for leaks with engine off and ignition on prior to reinstalling the air cleaner housing assembly along with its adapter and gaskets. In case of Fuel Injector Assembly unconnect electrical connectors from fuel injectors, remove Fuel Meter Cover/Pressure Regulator Assembly and using a screwdriver gently take out them from their seats. The injector consists of upper O-rings, lower O-rings as well as filter which need inspection for dirt or contamination after being removed from an injector; therefore, use another part including an identical replacement injector while sliding in a new filter then lubricating or installing new O-rings before pushing it into a fuel meter body. When replacing an IAC valve, make sure that you unplug its electrical connector before undoing it with an adjustable wrench. Take away old IAC valve gasket that should be discarded afterwards leaving throttle body clean while making measurements at different pintle positions. Finally adjust pintle if required after putting back new gasket before returning IAC valve completely for correct torque specifications when installing it. Reconnect the electrical connector and install air cleaner housing assembly, adapter and gaskets. As for the Fuel Meter Body Assembly, disconnect electrical connectors from fuel injectors and remove Fuel Meter Cover/Pressure Regulator Assembly, Gaskets and Seals. Remove the fuel injectors, unscrew the fuel inlet and return line threaded fittings, detach lines with O-rings removed. After removing the fuel outlet nut or gasket as well as the inlet one, put on a new throttle body-to-fuel meter body gasket then place the fuel meter body assembly via throttle body. Before tightening these screws to not forget to apply thread locking compound on them; thus use thread locking compound on the attaching screws of the fuel meter body-to-throttle body assembly. Install new gaskets as well as inlet-outlet nuts followed by installing it with a new TBI-to-manifold gasket and new O-rings on fuel line nuts. The air cleaner housing must be reinstalled together with adapters, gaskets. Finally, unplug all electrical connectors; remove the throttle linkage, return spring(s), transmission control cable (automatics), cruise control if equipped, detach vacuum hoses labeling them accordingly that they can be reattached later during reassembly. To remove the inlet and outlet fuel line nuts using a backup wrench removing those fuel line O-rings next are five TBI mounting bolts which lift that TBI unit up out of intake manifold where its old TBI manifold gasket will also be discarded. Put it onto a holding fixture if available or take care while working directly on benchtops without any additional protection against damages or spills when possible such as placing it directly upon top of another workbench. When cleaning up an individual part from dirtiness by inspection of mating surfaces as well as reinstallation of IAC valve or TPS do not forget to invert throttle body in order to remove IAC valve after taking off throttle body assembly including its old throttle body-to-fuel meter body gasket, the TPS or those screws attaching the fuel meter body to throttle body. Place fuel meter body assembly onto throttle body, secure it with thread locking compound on attaching screws and then install a new throttle body-to-fuel meter body gasket. Next the TBI unit with a new TBI-to-manifold gasket and new O-rings on fuel line nuts should be installed. As for vacuum hoses, throttle linkage, return spring(s), transmission control cable (automatics), cruise control cable and grommet with wire harness that returns through throttle body; after which all these parts can be reassembled back into place. Plug all electrical connectors in followed by connecting negative battery cable before checking to see if there is any fuel leaking with an engine off and ignition on. Set minimum idle speed in addition to TPS output values then reinstall air cleaner housing assembly adapter gaskets so as to finalize maintenance activities.

The Throttle Position Sensor (TPS) is a potentiometer attached to the end of the throttle shaft on the throttle body. It senses changes in output voltage to determine fuel delivery according to angle of throttle valve. Irregular bursts of fuel and an unsteady idle could be caused by a worn-out or slack TPS. The position sensor is located on one side of the throttle body. Look for loose terminals and wires, otherwise this sensor will not work properly. Prior to checking TPS, make sure that supply voltage and ground circuit are operational. Unplug the electrical connector and measure voltage across it, which should be about 5.0 volts. Otherwise, examine wiring too if not okay. To test its operation, reconnect with probe touching the dark blue wire terminal from behind as you gradually open up until there is smooth rise in voltage; otherwise replace it with another one as earlier mentioned above. In order to install a new TPS, remove some parts first in order to gain access for it including: disconnecting the electric connector while separating mounting screws too; besides these actions they have installed a new O-ring plus aligned TPS over which tightening had been done through screwing those four screws so that their ends only would remain visible underneath its groove where replacement must take place when necessary!

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

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 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