Throttle Body - Explained
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- Опубликовано: 5 фев 2025
- How does a throttle body work? What is a throttle body? A throttle body is a butterfly valve located between the air intake filter and the intake manifold. It regulates how much air can go into the engine, based on driver input through the gas pedal. As more air flows into the engine, it injects more fuel, thus allowing for more power. Throttle bodies today are mostly electronically controlled, where this throttle body is mechanical. It includes input for TPS and MAP sensors, as well as routing for the IAC valve, and a idle adjustment screw.
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This video is very useful. I finally understand how my car's damaged throttle body was affecting the oxygen sensor and overall acceleration and why my rev meter was out of control. Many thanks!
Carly McCalla GM throttle body remplacement 1990
This guy has done so much to educate people over the years. Wonderful channel.
wow never seen anyone get that detailed on a throttle body before. good job
Yes; exactly what I was thinking
Lla
😮yesss he did an AMAZING JOB! Thank you!!
I never would've thought I'd ever be watching Engineering Explained but this channel has helped me understand why something in my might go bad. Thanks!
Finally someone to explain this thoroughly and in detail. Thank you!
Thanks as always, Jason. Spreading knowledge is one of the world's most satisfying careers. Would love to see a video about your thoughts on throttle body spacers.
I have throttle body service this morning and I felt significant power when pressing the pedal. Thanks explaining this part.
Good explanation, thanks.
I was looking for videos on which product (throttle body cleaner vs carb cleaner) to use to clean the throttle assembly/valve on my scooter safely, and ended up getting a very useful tutorial.
This was great! I would like to see more in detail explanations of parts like that! Thank you
Hey thanks !You wore so detailed. I never seen someone explaining exactly everything how it works!
Excellent description of how the throttle body works! Unfortunately the auto mechanics always find a way to charge extra which is very frustrating...
Great video. One suggestion: on smaller, more involved parts like this, use a diagram or a still shot of it and draw on it in post production to show what you're referring to as you speak.
It's not that much of an issue because all the air channels and things like that are pretty distinct here, but some on-screen red lines and circles would do a better job of pointing to specific parts than would your fingers.
My comment is, that you are truly a gift to human kind.
Thank you so much, you explained it very well. My 2014 Chrysler 200 just had to have this part replaced, as I had never heard of it before, I was glad that I watched your video. Bloody practically new car and had to have a major fix like that after only 37,000 kmp.. Oh well.
You are the BEST,
You ARE the Man.
Thank you.
You are a Legend!
I'm glad you took time outta your day from being yellowstones lawyer to explain this too me thanks jamie
Thank you for explaining this so well, it was extremely helpful. Mine just went out and I had no clue what it was 😂
Very informative breakdown.👍
omg. now I understand. :D I' want to order a CAI brand cold air intake and while I was searching forums and watching youtube videos, the term "ported throttle body" came up. I'm fairly new to the car mod scene so this video is reaaaaally helpful. Thanks!
Awesome video! I'd love more like this, explaining the more nuanced parts of a car in detail with a physical specimen to look at.
Best video for Engineering students.
Great video man. I gotta 88 model chevy small block 350 tbi. You just gave me a much greater insight on the throttle body on it.
Thank you for this video. It dissipated several doubts I had about how the throttle works.
i have noticed throttle delay in my new car, specially visible in idling speed, engine is very slow to react when i press acceleration paddle, i must press continuously to rive the engine, is this wrong or its manufacturing feature?
Tighten your cable
oh wow i was wondering how the engine doesn’t stall when there is no airflow from the trottole body i had no idea there was a bypass hole that’s cool, good tutorial
Hello, just wanted to say thank you so much for sharing so much knowledge, may Allah bless you & give you great success in life & in health.
This was a great, concise explanation of a throttle body. Thanks so much, not a huge car guy and I'm supposed to design a throttle valve and do CFD testing on the air flow for my senior design project so this was a good start on the anatomy of it.
VERY helpful... Clear, concise, mystery dispelling video.
Thanks man. Was researching a throttle body coolant delete and this helped.
nice job .. you leave me with almost no question.. this is the kind of stuff we should learn in school.. thank you
Damm he's a good engineer he explain it so well.
I love the way you have explained....thanks😊
At idle it gets more fuel not more air I thought. Please correct me if if I was wrong. BTW I watch all of your videos and I absolutely love understanding how things work! Good work!
I also have request. I am in the propane and natural gas fuel system business. Can you make a video on how a propane fuel system works? Natural gas system? If you need resources I have all sorts!
Can you pls do advantages and disadvantages of throttle body, carburettor and injection system?
What do you think about throttle budy spacer?
Thank you for making videos like this. You are the guy I come to as soon as I need info on cars!
2015!!! how come I haven't found this channel before?
Here there is an alignment screw that ensures that the butterfly is in an idle position which means the exact 90 degrees with the surface and air passage is fully closed through the throttle variation. It cannot be the same for long duration of time and can be affected from multiple factors like dust and as you told climate. Instead of passing the air with the control of butterfly if we make sub holes on the surface of air flowing chamber and connect all sub holes to a single hole which goes to the combustion chamber and assign a piston at 180 degree instead of 90 degree butterfly it can last for a long time.
Wow, this is a very useful video. It really educates me about throttle body. So what makes my Opel Astra H have a high rev every time when I am starting the engine?
fantastic illustration
excellent explanation of mechanism of throttle body
The video is very helpful. I have a question, is there should be a small gap between the throttle plate/butterfly and the throttle wall?
I like your explanatins, learn alot as a newbie. That sad, RUclips is a global thing and alot of the viewers dosnt have English as first language, like me, so it would be highly preciated if you could talk somewhat slower in the videos. THx.
Simple, Clear and well done.VERY well done !
Thanks for the video, mine was replaced yesterday at the dealership and I was just curious as to what it was.
Great video! Everything I needed to know about this product, definitely switching to this throttle body.
Gave a good explanation for sure though great work dude
So the TP sensor is the one that send info to the PCM to command the amount of fuel that should be injected, or is the MAF sensor the one that determines how much fuel should be injected.
Excellent job. You have almost made me an expert. 😊 Thank you 🙏🏼
Can you make a video for properly setting idle control and using the bis screw?
Explain the intake charge you were talking about when explaining the coolant hoses passing underneath to heat it up?
Could you make a video regarding ITB (Individual Throttle Body) and what the benefits are compared to single throttle body
With that red dot/screw, this throttle body looks alot like a Leica camera with lens on
you did very good, but you should explain a little more about the anatomy of the tb. like the names and what happens if you adjust that this way and that this way so on an so forth.
Hello Mr. Jason. I am 13 and I am very enthusiastic about cars and engineering itself. Thnx for all the knowledge you have given me. Just one question, what college did you go to and do you recommend it?
Malachi Williams I went to NC State. It was certainly a challenging and rewarding curriculum, though there are lots of good ME schools. My recommendation would be to go to something accredited and local to save cost.
NCSU is a really good school and pretty hard to get into, almost all of my friends got deferred. That should tell you about how smart Jason is. Just make sure you get the best grades possible and take a lot of science and math AP classes.
anyone went- VRROOOM!!!!
when he activated the throttle?
+Sonic the Hedgehog Stop it Sonic you don't even need a car.
This is great finally found out the reason why my car just slowed down while on the highway
Thanks. Very informative video.
Please explain how a PK PJ 3.0 throttle body works. It only has a kind of a vaccum lines attached. Is it electrical?
Intake manifold next vid would be awesome
No english closed caption? Darn...
Considering this video,another question poped out of my mind and that is when the engine starts,you don t press the accelaration pedal. Therefore,how does the engine suck air to keep running if the throttle body is closed?
Hey man a long time ago I wanted to say thank you for all your videos, I'm a car enthusiast that not only like when cars "look nice", I also like too know how to improve the way they work. I'm thinking about starting my engineering studies and I want to know in what area are you specialized? Is it automotive engineering? Or mechanical engineering?. I hope hearing from you soon.
Thank you again for what you do for all those car enthusiasts and engineering fans.
clear, detailed & to the point. excellent
Just found this video right now... you've earned a new sub!!!
Thanks for your information, I have a question please : What is the benefit of the vacuum line ?
You should consider making a video on Individual Throttle bodies, their applications, their benefits, their drawbacks, etc... I don't know much about them and I'm having a hard time finding information about them. Seems a little unorthodox to run an engine without an air filter... But like I said, I don't know much about the subject.
Those coolant lines do they connect to like the radiator??
Thank you! Not car savvy and your explanation helped me understand! I appreciate it!
So thats how it is... great information !!! thank you so much
Great, it's nice to see the part and understand all is component. Thanks.
Amazing video bro 👍🏽
Really good presentation!
Great explanation and very thorough. Can you explain what a throttle body spacer is and how it works ?? I have an F-150 w/6.0L engine. My son says I should put one on and it will help power and fuel mileage. Thoughts ??
does the mechanical throttle body need diagnosis after cleaning, and if you mistakenly ruin the adjustment? is there something to adjust really?
That was very interesting thankyou!! Please do a 20 - 40 test to see what increase you get
none if any
Excellent and detailed video.
2:24 I mess around with that screw and now want it back to how it should be. Do I just loosen it off again and turn it in by hand softly till I feel it stops turning and tighten it back up again?
I have a question is it okay to put a plug on the emissions control spout or no
Very interesting. Thank you very much for posting!
Excellent explanation. Really helped me with my project.
Can a loose gas tank cap cause issues for the throttle body valve, especially in cold weather?
Mind blown! Like a walking auto Wikipedia.
How does adjusting the idle adjustment screw influence idle rpm? Screwing it in = more idle rpm? Or is it the other way around?
what should we put into consideration when we upgrade a throttle body?
Professionally presented! Well done!
I love this channel
thanks you very much
I want to ask you about is the throttle valve should be full closed at idle speed or not?
hello, is this type is cleaning service under regular warranty or additional service cost
Could you explain independent throttle bodies? What is the benefit, and what do you sacrifice?
I'd love to see an explanation of Throttle Body Spacers and if they even truly do anything or not. Too much controversy.
Do your research and you would know. Spacers are all about adding Volumetric efficiency, (more air traveling through your plenum). This increases MPG, HP in higher RMP range, and keeps the engine cooler providing more cool air for better, more consistent performance output. It's really simple and the information is more than abundant, friend.
Fake Name that sounds like a personal problem as that was a cheap one lmao
Should the throttle plate seal 100% of the throttle body or is it normal to have a very thin line of air? I have an old lancer glxi 93 and my rpm is a little bit high. Hoping to get an answer from you good sir. Have a nice day.
The even better thing to do is to remove the whole throttle body and clean the area behind the valve more thoroughly. Also allows you to clean the small passages easier.
Hey do you think you could explain the vq37vhr engine on a video soon? I've tried to understand how the whole camless vvel system works but I just always find mixed info on that topic. If you can I would appreciate it. Great videos. Very informative and never a waste of my time unlike much of RUclips out there. Keep it up.
From what I can find it's not really camless it just works slightly different. It uses rocker arms to hit the valve tappets instead and the way it changes lift and duration is by changes the pivot point in the top control camshaft.
i first like your video as soon as it starts to play...
in some cars the iacv fails so they install a bypass with an idle up actuator working with the compressor and that works to prevent engine stall when ac is on...my question is, how is it that this bypass works when the iacv has already failed to begin with? is it because of the screw adjuster still allowing air for idle somehow?
What do you use as apposed to a throttle body and can you use fuel injectors with a throttle body?
my car threw a code suggesting the throttle body was the problem. also on the same day, the car lost power. It drug like it was in 3rd gear trying to get going from stop. It also threw another code suggesting canister purge valve solenoid. But I am assuming it is the throttle body that is causing the power loss correct? And why would both codes go at the same time. Could one be responsible for both?
I have heard that too large a throttle body can in some cases hinder performance due to slowing down air speed. Any thoughts on how to know when its time to go larger?
Could you also do a video on whether or not throttle body spacers work and if they're worth the money?
Hi just a quick question,
I have a BMW 330D and looking to increase the HP available, looking on-line you can get upgrade chips. Do these diesel upgrade chips work? Are they safe? Are they worth it?
Thanks for the videos man! Keep up the good work, best RUclips Vids going!
could you make a video explainning the formula used to calculate the right diameter of a carburetor's ventury for a given engine? like knowing the displacment of an engine what would it be the carburetor for it?