Where is the throttle body sensor on the engine size 5.0

Dirty fuel filter and air,dirty throttle body,next IAC sensor.

Hi Rich what make model an year vehicle ? Most vehicles have a IAC valve or motor - idle air control , There is a passage in the throttle body an this valve opens an closes this passage allowing more air past the throttle plate raising the idle ! This passage gets plugged by carbon an needs cleaning to restore the idle back ! Idle Air Control Valve How to clean throttle body and Idle air control valve iac There is no means for idle adjustment , the engine PCM controls It !

old post , and great question

the TB is a thing that contains the AIR throttle, the body holds

that TV throttle valve (or some call it a TP throttle plate)

this car has 6 engines, and varies by country. what country>?

what engine? (USA cars have a hood EPA tag, it states the engine)



sure cleaning it can help and for sure with throttle by wire.

the body gets full of EGR/PCV crap. (called GUNK) and if not

removed on high mileage cars, it jams the silly throttle by wire

motor. (and related\'s)

why not scan the PCM and SEE ALL DTC errors.

that be first. !!!



loose power has many causes, up to 50.

why not scan it first, (the CEL lamp to me is useless , unless stuck on)

scan it first.

this engine has many limphome modes (suzuki failsafe)

and will run slow. in limp mode.

scan it.

the TBW , throttle by wire has it\'s own limp mode.

the transmission too, and others.



The TBW has up to 4 TPS sensors. 2 on the foot and 2 in the TB

if ANY of the 4 , do not AGREE, you go to LIMP HOME MODE>

or end up like a Toyota and huge class action lawsuits.



loss of power, not transmission caused, (slips or skips gears)

is engine power loss.

cause by (top ones of 50)

1: never getting a tuneup. and for sure the 60k mile.

2: misfire, caused by 3 major things. ask.

3: flooding.

4: bad spark see #1

5: clogged air filters see #1

6: clogged fuel filter.

7: weak fuel pump.

8: and the big one is loss o f engine compression for huge list of causes.

9: not scanning the PCM and believing what it told you. !!!

how old is this truck ? needs complete tuneup, new air & fuel filters, wintertime brings out the all the problems, also, replace EGR valve, & PCV valve, they will choke the hell out of the engine, your filters are very important also, if there dirty/old, they will starve the engine. talk to the ole girl while you do all this work, she'll respond, I promise !!!! make sure all the vacumn lines are good, tighten all throttle body bolts, etc

I would have throttle body and mass air flo cleaned and see how she runs after that.If these items get dirty they can mess with computer and make engine run erratic.if still running bad have tps sensore checked.(throttle position sensor)these are noteted for idle jumping around.

Check out autozone.com or advanceautoparts.com to use as a reference.

Need to specify year, make, and model and engine size.

I need engine size? Some dodge Chrysler Plymouth have a sensor in distributor, location may depend on engine size?
The tps is attached to throttle valve, the throttle valve is in throttle body. I'll try give more info if you give engine size?
To answer, click on the comment link.

Check the vehicle for DTC'S - diagnostic trouble code's should be the first step in diagnosing this problem . But a tune - up not ! Reduced enging power is caused by a problem with the electronic throttle control . If you are not familiar with this ,your best bet would be to take to a qualified repair shop.
REDUCED ENGINE POWER: Refer to Powertrain Control Module Description in Engine Controls - 4.8L, 5.3L, and 6.0L

Throttle Actuator Control (TAC) Overview
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions as well.
The TAC system components include, but are not limited to the following:
• The accelerator pedal position (APP) sensors
• The throttle body
• The powertrain control module (PCM)
Each of these components interface together to ensure accurate calculations and control of the throttle position (TP)
Accelerator Pedal Position (APP) Sensor
The APP sensor is mounted on the accelerator pedal assembly. The APP is actually 2 individual APP sensors within 1 housing. There are 2 separate signal, low reference, and 5-volt reference circuits. APP sensor 1 voltage increases as the accelerator pedal is depressed. APP sensor 2 voltage decreases as the accelerator pedal is depressed.

One of these sensors could be sending conflicting data to the PCM - engine computer .

Reduced Engine Power Mode
When the PCM detects a problem with the throttle actuator control (TAC) system the PCM enters one of the following Reduced Engine Power Modes:
• Acceleration Limiting--The control module will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
• Limited Throttle Mode--The control module will continue to use the accelerator pedal for throttle control, however the maximum throttle opening is limited.
• Throttle Default Mode--The control module will turn off the throttle actuator.
• Forced Idle Mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
- Ignore accelerator pedal input.
• Engine Shutdown Mode--The control module will disable fuel and de-energize the throttle actuator.

Throttle Body Assembly
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signal, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.

Throttle body sensors are easy to replace(generally). you need to locate throttle body(air filter connected to it). A 9v battery sized sensor with two or more wires should be connected to it. If you can find this it should have snaps on the sides ot top that disconnect it. Sensor should also be inexpensive. Good luck hope I helped.

Did what in a tuneup? If done yourself, are you sure everything is connected correctly? Spark plug leads?
Was it running OK before the tuneup?
Was the throttle/ throttle body touched at all?
Carbon can build up in the throttle body of the Corolla, which (will/ may) eventually interfere with the throttle butterfly seating properly. Too much air is available at idle, can cause rough running.
If the idle bypass air was "adjusted" at tuneup, maybe it was incorrectly done.
Did anyone change the spark setting?