Question about 1988 Ford F 150

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On my 1988 ford truck my throttle position sensor keeps reading low voltag even thou i put a new one on it and changed the altinator as well

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 1988 ford f150 running rough

Might want to change o2 sensor's, If they are not sending the right single its tell the computer to dump fuel. 1988 was using a fuel density system.
(1989 came out with Mass air flow system)
Check this
I think it might have a TFI module that's not working right. Located under distributor. Its gray and about 4" long and if equip, you need a 4 or 5.5 mm tool to unbolt it. This was a common thing back in the 80's. Its been so long I can't remember if the 4.9 straight 6 had it or not.
T- Thick
F- Film
I- Ignition module

Posted on Apr 24, 2009

  • 2984 Answers

SOURCE: where is the throttle positioning sensor located

Please don't forget to rate!

Disconnect and remove the TP sensor from beneath the throttle body

View of the throttle position sensor mounting-4.9L, 5.0L and 5.8L MFI engines shown, others similar


Exploded view of the throttle body mounting-5.0L and 5.8L engines

Posted on Mar 06, 2010

  • 4669 Answers

SOURCE: 1988 ford f150 302: heavy hesitation.

Check engine light? Have you checked fuel pressure?

Posted on Apr 06, 2010

  • 196 Answers

SOURCE: When I put the gas peddle to the floor the engine

ignition timing incorrect or not operating properly

Posted on May 10, 2010

  • 210 Answers

SOURCE: i have a 2000 ford

i would check you mass air flow sensor i think you ll find your problem there
give me some feed back if this helps
good luck

Posted on Jan 23, 2011

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My 02 2.0L XLS Ford Escape is experiencing idle issues. Will not idle unless on the pedal, not consistent then . It is causing lunging in all 5speeds. High RPMs aren't troublesome.Thank you.

I had a similar problem with my ford contour. I replaced my throttle position sensor, that took care of the problem.
With car in ignition turned on, (car not running) check the voltage at the sensor. Should be 5 vdc. The two out side pins is where you check. If I remember the top pin is the positive and bottom is negative. Now you want to check feedback voltage. Put one probe to negative and the other to the middle pin. With throttle plate closed it should read around .5 volts (I've also seen people adust them to .94 volts). Check specs for your car. Now move throttle plate you should see the increase of voltage .5 to 5 volts max. Keep an eye on your meter to see if ther is any flats spots in the sensor. Meaning no voltage reading. Move to the open position slowly, you should see a steady increase of voltage no jumping around.if there is it needs to be replaced.

Nov 27, 2015 | Ford Cars & Trucks

2 Answers

What can I do to fix my 1988 Ford Bronco xlt with a 351 engine that has rough idle and loss of power when in drive?

Fuel filter. Low fuel no power. Catalytic converter. no air out, no air in. loss of power.

Jan 25, 2015 | 1988 Ford Bronco

1 Answer

Engine light came out and give me the code P2135

P2135 FORD Description

Electric throttle control actuator consists of throttle control motor, throttle position 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 Engine Control Module (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

Read more:

Feb 17, 2013 | 2005 Ford Explorer

1 Answer

Throttle pedal position sensor "A" circuit low input

Sounds like the Throttle Plate is sticking

You were fooled into changing the TPS because of the code

Not the way you diagnose vehicle issues

You find out why a sensor--- good or bad set the code

Get some CRC Throttle Body Cleaner & follow the instructions

Don't need much sprayed around the throttle plate

Then have someone step on gas pedal to confirm success

May need the key on

Your low input is the throttle not returning to home position

Almost like the sensor was telling you what was wrong

Fun stuff isn't it & not easy to understand

Feb 03, 2013 | 2001 Ford Taurus

1 Answer

Engine code p0122 keeps coming on

P0122 ACURA - Throttle Position Sensor 'A' Circuit Low Voltage.Possible causes- Faulty throttle position sensor.
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection When is the code detected?An excessively low voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

Dec 21, 2012 | 1998 Plymouth Grand Voyager

1 Answer

Where is the fuel sensor?

Yes, that helps. The THROTTLE POSITION SENSOR is a black plastic device [abbreviation is TPS] mounted on the throttle body. It is held on with 2 screws and has a 3 wire electrical harness plugged into it. The easy way to locate the throttle body [in case your brother does not know] is to follow the black rubber tube which goes from the air cleaner to the engine. the aluminum device that rubber tube connects to, is the throttle body. There is another sensor called the IAC [Idle Air Control Valve] which also is attached to the throttle body. The IAC usually has 4 wires, rather than 3, going to it. That is the easiest way to differentiate it from the TPS [Throttle Position Sensor]
The TPS can be changed by unplugging the wiring connector and removing the two mounting screws. To further complicate the issue, Ford used two styles of TPS. One style has slotted holes for the two mounting screws. The slots are designed to allow the sensor to be adjusted. The second TPS design does not have slotted mounting holes in it. It can only go on one way, and is NOT adjustable. If your car has the style with slotted holes, you will need to use a computer scanner to read the voltage of that sensor [with the key on, engine off and gas pedal [aka throttle pedal] at idle. If the voltage for the TPS is between 0.9 and 1.1 volts, everything is OK. If the voltage is not within that tolerance, you must loosen the mounting screws and move the sensor in the slotted holes, to get the proper voltage reading.
If this is all to confusing for your brother, you will need to take the car to a professional mechanic.
Does your brother know if your engine has throttle body fuel injection or four individual fuel injectors? I ask, because that also makes a difference.

Nov 27, 2011 | 1998 Ford Escort

2 Answers

1992 K1500, code 22, clicking noise from throttle body, will not accelerate properly, changed TPS with no change

OBD Code 22 - Throttle Position Sensor Error (Signal Low)
The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve. The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

* Extended cranking, possible no-start condition
* Lack of power
* Erratic transmission operation

Common Problems:
* A failed Throttle Position Sensor (TPS) would be the most common causes for code 22
* Testing the TPS circuit would involve checking voltage and ground from the ECM-5v is the normal reading between the ECM reference circuit and the ECM ground circuit at the TPS connector. Checking the TPS signal circuit to the ECM would involve monitoring the TPS signal on a scan tool while jumping the 5v reference and the signal circuits. The TPS reading should go from high when the circuit is "jumpered" to low when the jumper is removed.

Keep us updated.

May 04, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

Saber que es codigo 15 codigo 20 y codigo 25 isuzu trooper mod 1988 gasolina 2.600 cc. inyectado

Revise estos codigos correspondientes al sistema OBD I...

13 Open Oxygen Sensor Circuit
14 Coolant Temperature Sensor (High Temp Indicated)
15 Coolant Temperature Sensor (Low Temp Indicated)
21 Throttle Position Sensor (Signal Voltage High)
22 Throttle Position Sensor (Signal Voltage Low)
23 Manifold Air Temperature (MAT) Low Temp Indicated
24 Vehicle Speed Sensor (VSS) Circuit
25 Manifold Air Temperature (MAT) High Temp Indicated
32 EGR system fault
33 MAP sensor circuit (signal voltage high, low vacuum)
34 MAP sensor circuit (signal voltage low, high vacuum)
44 Oxygen Sensor Circuit (Lean Exhaust Indicated)
45 Oxygen Sensor Circuit (Rich Exhaust Indicated)
51 PROM error (faulty or incorrect MEM-CAL).


Apr 18, 2011 | 1987 Isuzu Trooper

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