Throttle body and tps
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Joined: Dec 2008
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From: prince george, va
Throttle body and tps
i just finished putting on a new tb and a new tps on a friends 05 sxt 2.0. the tb is an aftermarket part but it is the stock size. everything went back on like it should. but i assume the idle adjustment screw isnt adjusted correctly. i know if you buy a tb from the dealership, its set to where it should be at the factory. im getting some what of a high idle. rpms's are hovering a little over 1k at idle. i hooked my scanner up and absolute tps is reading 16.6% at idle and 73.3% at wot. im halfway tempted to mess with that adjustment screw to lower the rpm's. im trying to figure out what voltage the tps should be before i do that. i contacted the dealership to see what info i could get, but as usual they are of no help unless your spending money with them. the manual i have for the neons didnt say anything about what im looking for. so maybe one of yall might be of some help. thanks in advance
Last edited by mcfisher1980; Jun 3, 2010 at 09:13 PM. Reason: mispelling
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From: Northern California
DESCRIPTION
The throttle position sensor mounts to the side of the throttle body.
The Throttle Position Sensor (TPS) connects to the throttle blade shaft. The TPS is a variable resistor that provides the PCM with an input signal (voltage). The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.
OPERATION
The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the powertrain control module) represents throttle blade
position. The TPS output voltage to the PCM varies from approximately 0.6 volt at minimum throttle opening (idle) to a maximum of 4.5 volts at wide open throttle.
Along with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. The PCM also adjusts fuel injector pulse width and ignition timing based on these inputs.
The throttle position sensor mounts to the side of the throttle body.
The Throttle Position Sensor (TPS) connects to the throttle blade shaft. The TPS is a variable resistor that provides the PCM with an input signal (voltage). The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.
OPERATION
The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the powertrain control module) represents throttle blade
position. The TPS output voltage to the PCM varies from approximately 0.6 volt at minimum throttle opening (idle) to a maximum of 4.5 volts at wide open throttle.
Along with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. The PCM also adjusts fuel injector pulse width and ignition timing based on these inputs.
Record Breaker
Joined: Dec 2008
Posts: 1,200
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From: Claremont NC
Sounds like you need to reset the pcm and let it relearn the new airflow settings.
Disconnect the negative battery cable for 1-2 minutes, reconnect and start the engine letting it idle only (DO NOT REV the engine) and let it come up to operating temp. Switch it off and restart. Take it for a drive doing as many stops, such as stop signs, for the first 20 to 25 miles without going WOT. This will allow your PCM to relearn the part throttle settings. Good luck.
Disconnect the negative battery cable for 1-2 minutes, reconnect and start the engine letting it idle only (DO NOT REV the engine) and let it come up to operating temp. Switch it off and restart. Take it for a drive doing as many stops, such as stop signs, for the first 20 to 25 miles without going WOT. This will allow your PCM to relearn the part throttle settings. Good luck.