Question about 1998 Jeep Grand Cherokee

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My 1998 jeep grand Cherokee 4.0 engine has a idle problem. when I start the jeep it runs wide open with no control at the throttle. I Replaced the head on the vehicle.I have checked all vacuum hoses f

Correct voltage appears at the throttle sensor,unable to locate problem

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You need to check all sensor connections as the crank shaft sensor also will mess up your idle....try slightly unscrewing the tps and push it up or down slightly to see if this fixes the problem.

Posted on Nov 11, 2014

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1986 Cadillac Sedan Deville. Does anyone have an image of what the throttle position sensor looks like and exactly where its located? Thanks


I found this picture, if that is correct? Probably a three wire connector, ref voltage--ground--signal. I did see another picture, I wasn't sure? This picture said dfi.
26402035-t1caujrehn2c51ceuh1dikd4-1-0.jpg

Dec 16, 2016 | Cadillac Cars & Trucks

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1996 Jeep Grand Cherokee 4.0 auto idles good but will only move with it wide open or just barely any throttle


4.0L
what transmission, mines a 5 speed stick so?????
idles good, well that dont take much.
will only move, car moves?
with what wide open ,the throttle?
well just barely throttle is normal, why say that?

my guess is car has low power, or can not go fast in all gears.
is that it?
if yes, that is transmission slip or a weak engine,
transmission slip is easy RPM goes way high car dont move
weak engine acts like brakes stuck on , low RPM deep right foot.
post all symptoms and win, big time.

Feb 22, 2015 | 1996 Jeep Grand Cherokee

1 Answer

Jeep Grand cherokee rough idle and engine cuts out when you hit the gas


what engine.
hot or cold engine , or both?
does the cut out catch up.?
does it have full engine power up a hill wide open throttle. (key test)
on cuts, out tip-in throttle ?
dash CEL lamp off running.
scan PCM , no DTCs stored? (errors)
ever do the 60k mile tune up , (sparks and filters?)
i have 10 more quesitons, id see in 5min testing car. but .... here are some.

Aug 08, 2013 | 2006 Jeep Grand Cherokee

1 Answer

01 hyundai xg 300 absolutely no throttle response


you need to connect a diagnostic machine to your obd socket, you can actuate the tps through the machine, it will also give you the correct location of wires/connectors.

Apr 25, 2017 | 2001 Hyundai XG300

1 Answer

When i punch on the gass my 97 tahoe hesitates


usually a bad MAP sensor or TPS. I would test both. Let me know if you have questions and provide test results for repair advice.

MAP Sensor TESTING
See Figures 3, 4 and 5
  1. Backprobe with a high impedance voltmeter at MAP sensor terminals A and C.
  2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
  3. If the voltage is not as specified, either the wiring to the MAP sensor or the ECM may be faulty. Correct any wiring or ECM faults before continuing test.
  4. Backprobe with the high impotence voltmeter at MAP sensor terminals B and A.
  5. Verify that the sensor voltage is approximately 0.5 volts with the engine not running (at sea level).
  6. Record MAP sensor voltage with the key ON and engine off.
  7. Start the vehicle.
  8. Verify that the sensor voltage is greater than 1.5 volts (above the recorded reading) at idle.
  9. Verify that the sensor voltage increases to approximately 4.5. volts (above the recorded reading) at Wide Open Throttle (WOT).
  10. If the sensor voltage is as specified, the sensor is functioning properly.
  11. If the sensor voltage is not as specified, check the sensor and the sensor vacuum source for a leak or a restriction. If no leaks or restrictions are found, the sensor may be defective and should be replaced.



jturcotte_512.jpg

Fig. Fig. 3: Location of the MAP sensor-TBI system shown


jturcotte_513.jpg

Fig. Fig. 4: Probe the terminals of the MAP sensor to check for proper reference voltage


jturcotte_1792.gif

Fig. Fig. 5: Manifold Absolute Pressure (MAP) sensor wiring diagram








TPS TESTINGSee Figures 2, 3 and 4

  1. Backprobe with a high impedance voltmeter at TPS terminals A and B.
  2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
  3. If the voltage is not as specified, either the wiring to the TPS or the ECM may be faulty. Correct any wiring or ECM faults before continuing test.
  4. Backprobe with a high impedance voltmeter at terminals C and B.
  5. With the key ON and engine off and the throttle closed, the TPS voltage should be approximately 0.5-1.2 volts.
  6. Verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed. Make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading.
  7. If the sensor voltage is not as specified, replace the sensor.



jturcotte_514.jpg

Fig. Fig. 2: Using a DVOM, backprobe terminals A and B of the TPS sensor to check for proper reference voltage


jturcotte_515.jpg

Fig. Fig. 3: Using the DVOM, backprobe terminals C and B of the TPS sensor, open and close the throttle and make sure the voltage changes smoothly


jturcotte_1793.gif

Fig. Fig. 4: Throttle Position Sensor (TPS) wiring diagram

May 30, 2011 | Chevrolet Tahoe Cars & Trucks

1 Answer

My truck have check engine on the computer say is the troubleshooting p2135 what is that? is bad ? how I can fix? is 1 ford f-150 2005 in 8 cilinder motor 4.6


It is referring to the throttle/ pedal position sensor which is either located at the top of the gas pedal or on the throttle body. The code is pertaining to the sensor not having the correct voltage. You could have a loose connection or the sensor could be dirty or just faulty all together. You need to do hook up a digital multimeter and do a sweep by pressing the gas pedal and see if the voltage changes accordingly.

Dec 22, 2010 | Ford F-150 Cars & Trucks

1 Answer

My 2003 chevy truck goes into limp mode and pulls code PO220.Where is the tps sensor located?


Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- No throttle response Possible Causes - Harness or connector (The TP sensor circuit is open or shorted.)
- Electric Throttle Control Actuator (or Throttle Body Motor)
- Accelerator Pedal Position Sensor (APP) P0220 Description Electric Throttle Control Actuator consists of throttle control motor, throttle position (TP)sensor, etc. The throttle position sensor responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.
When is the code detected? An unexpected voltage from the TP sensor is sent to ECM.

Dec 08, 2010 | 2003 Chevrolet Silverado 1500

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