Question about 1996 Chevrolet S-10 Pickup

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Throttle position sensor

How can I adjust the throttle position sensor on my 86 s-10 2.8 two wheel drive?

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There are three wires going to the TPS one is a ground and one is a 5 volt reference the other is the sensor return
you will need a volt meter check your wires find out which is the 5 volt reference then take your meter and hook it up between the other 2 wires ( the ground and the return) read this
you can then loosen the 2 mounting screws and shift the sensor to obtain the proper reading

most of the time it is not necessary to change the sensor position unless the min air rate screw has been adjusted

if the reading is way off chances are the sensor is bad

hope this helps David

Posted on Nov 15, 2008


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Posted on Jan 02, 2017


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Dtc p0121 throttle position (tp) sensor performance

code p 0121 has to answers
1--refers to throttle position (TP) sensor/accelerator pedal position sensor A--range /performance problem====causes --accelerator cable adjustment--TP/APP sensor ---wiring
The second reference is the same and the causes are--accelerator cable adjustment--TP/APP switch
(APP is accelerator pedal position)

Aug 30, 2016 | Cars & Trucks

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How do I adjust the throttle position sensor on my 93 cadillac seville sls 4.9l engine?

4.5 And 4.9L Engines
  1. Remove the air cleaner.
  2. Remove the TP sensor connector.
  3. Unscrew the 2 TP sensor attaching screws and retainers, and remove the TP sensor.

To install:
  1. With the throttle valve in the normal closed idle position, install the TP sensor on the throttle body assembly.
  2. Install 2 TP sensor attaching screws with retainers. Do not tighten the screw until the TP sensor is adjusted.
  3. Install the TP Sensor connector. Adjust the TP Sensor and perform the idle learn procedure.
  4. To Perform the TP sensor adjustment.
    1. Disable the generator by grounding the green harness connector plug adjacent to the generator.
    2. Start the engine, enter diagnostics, and select PCM override PS103 'ISC Actuator'
    3. Press the 'COOLER' button on the CCP to retract the ISC Actuator. This action will disengage the A/C compressor and command the EGR 'OFF'. The Climate control center display will change from '50 to 00'. The ISC Actuator will slowly retract (about 20 seconds) to a fully retracted position. Verify that the throttle lever is resting on the minimum idle speed screw. With the ISC Actuator plunger fully retracted, disconnect the ISC harness.
    4. Select the PCM data PD01, 'TP Sensor', while still in PCM override PS03. Note the throttle position (in degrees) displayed on PCM parameter PD01.
    5. (-0.5° TO + 0.5°)

      No TP sensor adjustment required. Reattach the ISC Actuator harness and disconnect the grounding wire at the generator.
    6. TP Sensor (-10.0° TO -0.6°) or TP Sensor (+ 0.6° TO + 90.0°) TP Sensor adjustment required.

  5. With the engine 'OFF' and the ignition 'ON', reenter diagnostics and select PCM override PS03 'ISC Actuator'. Press the 'COOLER' button to retract the ISC Actuator the minimum air setting.
    1. Loosen the TP sensor screws just enough to permit the sensor to be rotated. Open the throttle slightly and allow the throttle lever to snap shut against the minimum air screw. Adjust the TP sensor so the parameter display is 0°. Tighten the TP sensor mounting screws with the sensor in the adjusted position. Recheck the parameter to be sure the TP sensor parameter is (-0.5° to + 0.5).
    2. Install the air cleaner.

Dec 25, 2015 | Cadillac Cars & Trucks

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What is the ignition timing for 2002 nissan hardbody 2000i 16v

Here are the 3 engines listed for this year. IGNITION TIMING

2002 Nissan/Datsun Truck Frontier Pickup 2WD 2.4L SFI 4cyl

The Ignition Timing

18-22 DegreesBefore top dead center - When throttle positionsensor disconnected and using suitably programmedscan tool.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (750-850 RPM)transmission in neutral.


2002 Nissan/Datsun Truck Frontier Pickup 2WD 3.3L SFI 6cyl

The Ignition Timing

8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (700-800 RPM)transmission in neutral.


2002 Nissan/Datsun Truck Frontier Pickup 2WD 3.3L SFI SC 6cyl

The Ignition Timing

8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chockdrive wheels, curb idle speed (700-800 RPM)transmission in neutral.

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How to ajust trottle linkage on transmission

Throttle valve cable adjustment:Place throttle body in idle position. Press cable lock button to release cable. Pull cable conduit toward rear of vehicle until wiper is completely retracted into end of conduit fitting. Release cable lock button. Raise vehicle for access to trans throttle valve lever. Rotate throttle valve lever toward front of vehicle until ratcheting sound (from cable) stops. CAUTION " Do not rotate throttle valve beyond the idle stop. The lever, valve and manual lever shaft will be damaged if rotated too far." Check cable adjustment. Throttle valve lever should begin to move at same time lever on MPI throttle body moves off idle position. Lower vehicle. 1991/1992 Rear Wheel Drive Truck There is also an adjustment procedure for front and rear band adjustments at engine if you need them.

Jul 27, 2014 | 1992 Dodge Dakota

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Throttle position sensor

Yes. the throttle potentiometer operates on resistance and accordingly opens or closes the throttle to adjust the amount of air intake going into the air horn.
Good luck.

Mar 07, 2014 | Chevrolet Astro Cars & Trucks

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I have Civic 2001 with 160,000 miles on it. i have problem when i am driving on high way on 80/mph rpm stay on 2800 and after 5 minuts rpm goes to 3500 and i feel loud noise like engine is taking more...

If the car type is manual transmission:
- Perform the clutch and pressure plate test.
- Pull up the hand brake, shift the lever to 1st gear, rev up to 2000 rpm, release the clutch pedal at once.
- If the engine does not stall, replace the clutch, pressure plate, clutch bearing, regrind the fly wheel and pressure plate precisely.
- If the engine stalls, the clutch system is OK and do not need any clutch system repairing.
- If the clutch system is OK, check vacuum leaks through intake manifold, vacuum hoses, PCV valve and throttle control cable adjustment, MAP sensor and Throttle Plate Position sensor adjustment (9.8 percent or 0 degrees at TP sensor fully closed position).

If the car type is automatic transmission:
- Check the transmission control cable adjustment.
- Check vacuum leaks through intake manifold, vacuum hoses, PCV valve and throttle control cable adjustment, MAP sensor and Throttle Plate Position sensor adjustment (9.8 percent or 0 degrees at TP sensor fully closed position).
- Check the Automatic Transmission Fluid level in the transmission with the car on level floor, engine start, gear lever in P.
If the problem persists, contact a competent technician or service personnel.

Jan 19, 2014 | 2001 Honda Civic

1 Answer

How do I change the Throttle Position Sensor

Some throttle position sensors are adjustable. Follow manufacturer's instructions.
  • On older engines, correct adjustment is crucial to proper system operation.
  • On newer engines, this is not as important because the computer uses whatever reading it takes at idle as base voltage (adaptive learn strategy).
Incorrect TP sensor adjustment may cause:
  • Inaccurate idle speed,
  • Engine stalling, and
  • Acceleration stumbles.
Follow these steps to adjust a typical TP sensor:
  • Backprobe the TP sensor signal wire and connect a voltmeter from this wire to ground.
  • Turn on the ignition switch and observe the voltmeter reading with the throttle in the idle position.
  • If the TP sensor does not provide the specified voltage, loosen the TP sensor mounting bolts and rotate the sensor housing until the specified voltage is indicated on the voltmeter.
f32-29.gif A TP Sensor with elongated slots for sensor adjustments. Courtesy of General Motors Corporation - Chevrolet Motor Division.
  • Hold the sensor in this position and tighten the mounting bolts to the specified torque.
Most throttle position sensors are made so that their adjustments are tamperproof. They have screws that are either soldered or staked.
To remove the switch, these might need to be drilled or filed off. After the new switch is installed and adjusted, the new mounting screws are restaked.

May 24, 2012 | 1991 Buick Regal

1 Answer

95 taurus idling too high like it is stuck wide open

Several issues can cause this problem, either singularly or in combination.. Check the throttle body for dirt and sticky carbon deposits. clean the throttle body using a spray can carburettor/choke cleaner, and with the throttle valve held open, wipe out the bore of the throttle body with a solvent soaked clean rag. Make sure the throttle valve is not sticking any where in the throttle travel between closed and open.

Next, check the idle air bypass valve that is mounted on the top of the throttle body, for dirt and carbon deposits inside that can cause the idle air bypass valve to stick in an open position. Clean the inside of the idle air bypass valve with carb cleaner.

If the ignition timing is over advanced, (Specifies timing advanced is10 degrees Before Top Dead Center, with the in-line spark out plug removed from the spout connector housing, and with the idle speed set to the idle RPM shown on the emissions sticker under the hood, with the engine fully warmed up,) use a timing light to check and set the ignition timing to specification.

The throttle position sensor must be installed on the throttle body using the required method or the idle speed will likely be excessively high. Beginning with the battery negative cable disconnected from the battery, and with the throttle position sensor removed, place the sensor in position on the throttle body with the drive tabs on the sensor placed after the drive tabs on the throttle shaft, the holding the sensor on the throttle body, rotate the sensor counter clockwise to align the mounting screw holes in the sensor and the throttle body, Insert the sensor screws into the senor screw holes, into the threaded holes in the throttle body and tighten finger tight. Carefully center the sensor on the sensor screws, then tighten the screws firmly without over tightening. Reconnect the sensor electrical harness connector.

Inspect the throttle valve idle stop screw adjustment that holds the throttle valve open slightly, to prevent the throttle valve from touching the throttle body bore surface with the throttle closed, and the accelerator pedal unpressed.

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Tps location

The Throttle Position sensor (TPS) is a potentiometer that provides a voltage signal to the PCM that is directly proportional to the throttle plate position. The sensor is mounted on the side of the throttle body and is connected to the throttle plate shaft. The TPS monitors throttle plate movement and position, and transmits an appropriate electrical signal to the PCM. These signals are used by the PCM to adjust the air/fuel mixture, spark timing and EGR operation according to engine load at idle, part throttle, or full throttle. The TPS is not adjustable.


Fig. TPS location on the throttle body-typical

Hope thios helps (remember rated this).

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1 Answer

Jeep cherokee grand p 121 2004

code refers to throttle cable adjustment, throttle position sensor, throttle position switch,throttle pedal position sensor, throttle position position switch, this is the areas that you need to check out

May 29, 2010 | 2004 Jeep Grand Cherokee

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