How a Fuel Pump Works

[@speedkar99]

Replacement fuel pump motors can be found here: amzn.to/2xuDpmr A basic metric socket set is all you need to access it: amzn.to/32cEhKm If you are having issues with fuel pressure, check it using this tool from OTC: amzn.to/2xynzHi

[@donnatrump1403]

What's the rubber thing at the top called?

[@bekind42]

I spent 6 minutes of my life on this video and it was worth every second. I've learnt sooooo much in this short video. Thank you for taking the time and making this video. You would make an excellent teacher or trainer. Thanks again!

[@Sncedayone]

Learned

[@jorgetoloza269]

This dude should be at a UNIVERSITY teaching..he talks great n makes u understand every detail..God Bless you..

[@speedkar99]

Man I wish I could have a day job doing what I do

[@glasser2819]

@@speedkar99 the problem when you're brilliant is you tend to over shine many regular cats 😂

[@tnamen1307]

@@speedkar99 why pin 86 and 87 of fuel pump relay has already got power even when KEY IS AT ON POSITION?? IS NOT IT SUPPOSED TO GET ACTIVATED ONLY WHEN ENGINE RUNNING??

[@StrongestNormal]

​@@tnamen1307 you have to have power at the fuel pump before the engine is running. otherwise there isn't any pressure in the fuel system and then your engine wouldn't get any fuel when your try to crank it, certainly when your car has stood still for like 2 weeks any pressure in the system is gone. depending on what motor you have, direct injected motor have an high pressure pump. the fuel pump in your fuel tank builds up pressure until around (3 bar, depending on what application you have) and sends it to the high pressure pump where it gets compressed until around 100 bar

[@danielmwauragichiri7958]

@@glasser2819 good morning, I have a problem with 1TR engine. Wish If you can help

[@kingalex29339]

It's amazing how many things are working together in a car, and how complex things like a fuel pump are.

[@Beenman27]

This guy knows how to make and edit a video. Many KZbinr's can learn from him. Thanks, very interesting on the fuel pump.

[@speedkar99]

+Leon Duigan Thanks Short and to the point is my video style!

[@tteuvky]

i think he edit too much

[@poppyatcs4529]

I totally agree!

[@Slayamongus12kr]

Leon Duigan sikringer til fuelpump på mer cedes c220cdi o6 modell

[@Slayamongus12kr]

John Oliger sikring til c 220cdi 01modell

[@justanotheerampart]

best 6 minutes I've ever spent in KZbin, straight to the point, in word's anyone can understand. thank you good sir

[@rajdeepdas86]

Very good explanation. Recently the fuel pump in my car broke down, and I came here to understand how it all works. Thank you so much.

[@UniversalVibesTV]

Me also. Fascinating

[@tgoodm1]

How anyone can give this video a "thumbs down" is beyond me. This video was incredibly detailed and more than what I expected. I am glad that I found this channel. It will certainly take my learning to a higher level. Great work!!!

[@speedkar99]

+tgoodm1 thanks I'm glad it helped you understand

[@dntlss]

You know the people that usually shine their brights behind you or drive with their high beams at night? the people that pull out of their driveway without looking? the people that drive 30 in the fast lane? people that will cut in front of you at the grocery store with 4000 items in the cart while you only have 3 and you have to wait till they are done? those are the kind of people that thumb down great videos like this, the dregs and idiots of society.

[@Euroasiagazzette1212]

One of the most worthy 6 minutes on KZbin.. Subscribed and highly recommend this channel. Respect from Pakistan 🇵🇰

[@paul2264]

Learned more in that short video and had every question I had about fuel pumps answered within 7 minutes. I had been searching the internet for 2 weeks now and still didn’t find the answers to my questions. Found this video and BAM every question and things I didn’t know I was gonna ask eventually were answered. This guy rocks.

[@speedkar99]

Glad it helped

[@mx1616]

You and me both man!

[@danwolf2744]

I have been looking for a video on how the in-tank fuel pump assembly works and have yet to come across anything even close to this until now. One of the best and informative videos I have ever come across on youtube. I love how you take everthing apart and even cut them open to explain how it works. Well done and keep up the great work.

[@speedkar99]

I'm glad you appreciate my teardown. Thanks

[@colinlyne1660]

Hey fella just wanted to come back and thankyou for this video because it taught me that my GM Agila a uk vehicle fuel filter was in the fuel pump assembly and it was stuffed full of crap. I had done the usual that is changed the pump initially and no change until I saw your video. cant tell you how brilliant your video was for me. I bought a complete unit and tested it off the car like you did and the pressure went from 7psi to 55psi and I new I was on the right track. Most other videos only focus on the pump. yours showed it all and I am a definate follower for the duration. You are a star in my view. Thanks for helping me!! I dont however understand why manufacturers put fuel filter in the unit anyway. I always thought fuel filters were outside so that they could more easily be changed. Go figure ay!! I really like you style especially your big spanner LOL!!! keep them coming. are you in the trade? excellent!!

[@speedkar99]

+colin Lyne thanks I'm glad you appreciate my videos and it helped you understand things clearer. I am an engineer in the day and a backyard mechanic at night...haha

[@thomashvnmusic]

I could tell you are an engineer. Cause mechanics don't open up things into little pieces to see what's in them. Only engineers do that. Long live our species. :)

[@theravedaddy]

@@thomashvnmusic ? I open up everything to find out how it works or has stopped working and ive been a mechanic for 42 years

[@KevinMartinez-dr9oe]

My car's fuel pump is giving me problems so I'm here looking for videos and you explained every single piece of the fuel pump. Respect! Excelente video!

[@speedkar99]

Glad it helped you out!

[@doodlesdaturtle]

Awesome video. Great pacing, no bs at all

[@speedkar99]

+Ryan Dodds Thanks, short and to the point is how it should be

[@brianglenney8642]

This kind of video editing is reminiscent of old-school educational videos. Straight to the point and actually about the parts I wanna know.

[@zahidhasan9040]

Driving for one year and never got to know there's even a motor in the fuel tank. This video makes me wonder how complex ICE cars are. Btw, this video is great. very much straightforward

[@BBT609]

If not the best explanation of a fuel pump I’d ever seen!

[@ParadiseProjectsGroup]

This is how a great informational video is made. Good edits, no nonsense, not having to watch all 8 bolts being removed, just all pertinent information. Good job, thanks.

[@speedkar99]

+edenorchestra thanks Short and to the point is my style No need to bore you to death unscrewing bolts

[@glasser2819]

very true, engineers are direct to the point... that's why we dont mix with sales people that are wired with spaghetti logic 😎

[@justexrite]

Just what I needed to learn: thank you! You saved me the trouble of taking my old one apart. My Astro's fuel filter is separate from the tank, and its pressure regulator is built into the carburetor. It thus requires a return line to the tank from the carburetor. It's amazing that my new pump can put out as much as 60 psi with just that simple impeller you showed us, that is, if the fuel is blocked from flowing by a pressure measuring gauge. I didn't measure the flow rate, but adjusting the constriction to flow is how the pressure is controlled.

[@ryanheinrick5049]

As someone who doesn't know a damn thing about car stuff, I find this fascinating and educational. Well done.

[@speedkar99]

Thanks

[@rangerrick8220]

Excellent - quick and to-the-point. Didn't leave anything alone - opened it all! Well narrated. Good job!

[@chocolate_squiggle]

I'm just preparing to replace my fuel filter, didn't think I really wanted to get into the fuel pump / sending unit assembly at the moment but it's really quite simple and clever. Didn't realise the float and low petrol light were different mechanisms, I guess it's good to still have the dash light if your float circuitry fails for any reason. And it's just using the fuel as a conductor which disappears below a certain level, again so simple. I think we often get tricked into thinking things are really complex because the overall system is. It's great how you break these things down to make it more digestible.

[@speedkar99]

Agreed. Very simple.

[@visualbree]

Imagine if he forgot to press record. Impressive video by the way.

[@briandouglas2965]

😂

[@flightofthefatman]

I get so much out of your videos. You could be a lecturer or teacher of anything. You are really smart! Thank you!

[@speedkar99]

One day I'll probably be a teacher who knows

[@CoolestThing]

Nicely done video! I wish I knew as much about anything as you do about fuel pumps.

[@speedkar99]

+Coolest Thing thank you glad you learned something

[@joeaverager]

Ah-ha! That's why my low fuel light quit working several years back. The pump and fuel level sender continues to work so I ignore that problem. Great video. Good pace.

[@speedkar99]

+joeaverager so what now if you run low on gas?

[@labradormcgraw2409]

Great visuals, great editing, great video. No bullshit; just the bones of what we need to know. Brilliant.

[@speedkar99]

+Labrador McGraw thanks Short and to the point is my style

[@subashbose7575]

Really interesting and educative

[@subashbose7575]

My Hyundai santro has got a problem,when the engine gets hot, there is a missing, is it due to faulty fuel ump

[@Johny40Se7en]

Cool video. Great to see the inner workings, cheers. And that little pressure regulator at 4:01 is like a mini thermostat.

[@qCJLbggG4IWAY9nTH6o]

This video is so underrated. Amazing breakdown!

[@Captain_911]

You are the best auto mechanic in the world. Thanks for the video sir.

[@sschaffer27]

Best educational video I've ever seen on KZbin. Thanks!

[@speedkar99]

+Shane Schaffer Whoa, you haven't seen it all, check out my other videos for more!

[@ntuthukodube8108]

A lot of KZbinrs can learn from you. Brilliant video.

[@speedkar99]

Sure they can, we learn from each other

[@zerotrace000]

Can't thank you enough for your videos. Your detailed explanations are the best I have seen. May I ask where you acquired your knowledge? Did you attend university and obtain some sort of engineering degree? I have not seen anyone on KZbin with the level of engineering knowledge that you have.

[@rudolfhuijs4526]

Check Engineering Explained on YT

[@speedkar99]

Yes I have engineering degrees but we don't study this in school. I learn as you learn taking things apart on video and from repair manuals and reading up online

[@glasser2819]

@@speedkar99 yep, you are curious and like to understand complex engineered systems. The devil is always in the minute details that make things perform right, efficiently or fail prematurely 🙂 The more you learn the easier it gets because you aquire "brain muscle" to organize your knowledge 🤗

[@tnamen1307]

@@speedkar99 why pin 86 and 87 of fuel pump relay has already got power even when KEY IS AT ON POSITION?? IS NOT IT SUPPOSED TO GET ACTIVATED ONLY WHEN ENGINE RUNNING??

[@lloydvillanueva8310]

WOW! you sir really know how to break it down in teaching about how a fuel pump works!I I learned a lot more watching your video than I did watching 2 other videos before yours about fuel pumps!! Thanks!

[@speedkar99]

Glad you learned

[@SuperWhizy]

I have been dissuaded from building my own fuel pump after watching this very well-made video.

[@flightofthefatman]

I watched your video 5 years ago. You're still one of the very best on the internet. 🏫🎓

[@jay_321]

The fuel level sensor is a thermistor that stays cool when submerged so its resistance is high. When not submerged, it starts to get warm from the current and heat up. More and more current flows as it warms which allows the light on the dash to illuminate.

[@speedkar99]

+Jay _ that a a good thought, thanks

[@rmatalanga]

Jay_ you are wrong. The fuel level sensor is not a thermistor. It is a variable resistor (rheostat) whose output resistance (middle terminal) depends on the position of the arm which in turn depends on the amount of fuel in the tank. However, there are some vehicles, especial those with a return fuel line, that have a thermistor in the fuel tank. The purpose of this is to send the fuel temperature to the ECM for engine performance

[@bobchiggs]

You're talking about the low level light for the thermistor. The fuel quantity or fuel level is a series of resistors.

[@bobchiggs]

Good explanation of the thermistor though, the fuel level wording kind of throws us a curve.

[@DZ110]

Im gonna replace the fuel filter for me car soon, this video really solved all my questions in my mind. I always thought that the small tea bag was the only fuel filter for the whole system, until I watch this video and you cut things out for us

[@scottfirman]

That showed why its so important to never run out of fuel. The fuel going through the pump actually cools and lubricates the motor. Without it a fuel pump will overheat very quickly and that shortens its life.

[@speedkar99]

Good point

[@ismaeldossantos3296]

If you run out of fuel the engine stops running.

[@ZORSHRINER]

So much technology and details in a fuel pump, it is a magnificent complex of ingenuity. The more he cuts to find details, the more I appreciate engineering.

[@speedkar99]

I agree! I have a totally different perspective on cars, engineering and mass manufacturing now.

[@dougdevine27]

Dude! That was a fantastic explanation. Bien hecho!

[@speedkar99]

+dougdevine27 thank you!

[@justinlampel2408]

The amount of technology that went into making this one piece of a car is mind blowing.

[@sajsed2]

Great content as usual, your brother needs to keep an eye on his clothes hahahhaha

[@its_whack]

Legend has it hes still cutting into the fuel pump. What a great video explained every single peice love it.

[@speedkar99]

Glad you enjoyed it

[@christophermccolm4156]

Another awesome video! 🚗 Thank you! 😊

[@speedkar99]

+Christopher McColm thanks for the feedback

[@Guccimanggg]

Literally the best explanation video on anything I've ever seen. Well done. (not to mention funny!)

[@speedkar99]

Thanks

[@GeneFever]

CUT OPEN ALL THE THINGS! Another excellent video and your brothers sock made a surprise appearance.

[@speedkar99]

+Gene Fever Haha thanks. Yep I had to steal is sock. Its not like he needs it anyway. And yea cutting open everything is my plan for this car.

[@GeneFever]

That's a damn fine plan.

[@Leo-yn5fx]

Your channel is one of the best. We got chrisfix to show us how to replace parts and you to tell us HOW it works!

[@speedkar99]

+Leo glad you enjoy it. Thanks

[@erok3738]

Very informative. Great video!

[@speedkar99]

+Eric Weiser Thank you for your feedback

[@rarler3333]

Interesting about the fuel level sensor graduations. Thanks for the *excellent cuts and no stock music* and use of technical terms like series resistance. A+++

[@speedkar99]

Thanks, that's my style!

[@rarler3333]

@@speedkar99 Well, I had better subscribe, then. Done.

[@amoskamdoo9834]

This video makes me feel like a mechanic.

[@speedkar99]

Why?

[@paulvarathan6349]

Very good tutorial. All we do is sit and drive our vehicles. Without the fuel pump we are going no where.

[@speedkar99]

Agreed. Just as vital as...your tires or engine.

[@paulvarathan6349]

@@speedkar99 Yes...thats right..

[@CarsSimplified]

I'm working on a fuel pump tear-down video of my own; should be out within a month. The fuel pump I have is twice as tall, and I didn't have to use any power tools to get into the metal casing, so the inside will be a little cleaner. It's interesting how different the spinning element of the pump was between mine and yours.

[@speedkar99]

+Cars Simplified thanks, yes there are quite a few different pumps out there. Let me know when you post your video too!

[@CarsSimplified]

Forgot to tell you when it came out. It's posted now!

[@chanakyasinha8046]

D:

[@apericus]

Packed with useful information. Tight, fast-paced but comprehensive. Doesn't miss a thing. Love this video. Thank you.

[@speedkar99]

Thanks

[@wrapdump]

So this is one of the best things on KZbin I've ever seen, I learnt so much. I'll admit that initially I thought it was Donald Trump, my bad.

[@speedkar99]

+wrapdump I'm glad you learned something!!

[@geewhizz1970]

He leatnt

[@h7opolo]

3:38 interesting how the rotor has those rounded oval indentations. maybe for magnetic flux and/or possible fuel line contaminants.

[@NutsandGuts]

Why do the sparks generated by the brushes of the DC motor not ignite the fuel???

[@speedkar99]

+NutsandGuts you need air to ignite fuel. There is none inside the pump

[@NutsandGuts]

speedkar99 ok i get it, but what if I run out of fuel? Then air gets in right?

[@billgateskilledmyuncle23]

I'm guessing gasoline does not conduct electricity like water. If you tried this with water it would short the motor out and it wouldn't even spin.

[@51-FS]

they are bushless motors

[@51-FS]

guess i should of watched video befor commenting

[@beed-x6726]

හොදම පැහැදිලි කිරිමක්, අනිවාරෙන් ඔයාගේ video නරඹනවා, superb, grate work, translate you my word, it sinhala

[@speedkar99]

Thank you

[@Rahul-sc9ys]

You are the best.

[@speedkar99]

+Rahul thanks Rahul

[@JonieGuz]

Damn! This guy knows his shit. This is the type of self confidence I want to expect from my mechanic before and after dropping off my car...

[@speedkar99]

Thanks! I learn as you learn while making the videos.

[@RipJawsX95]

yay the toothbrush is back!

[@speedkar99]

+RipJawsX 95 yes it sure is

[@lotwizzard1748]

best pointer 🏆

[@larrycrawford9237]

EXCELLENT EXCELLENT!!!!Yes very good, very educational, very easy to to follow and understand. Your video describes how a fuel pump works and breaks it down in steps and the individual mechanisms...EXCELLENT EXCELLENT!!!!!

[@ChunkyMonkaayyy]

Good stuff.

[@speedkar99]

+Hugh Jafro thanks

[@goddamnadam623]

Very helpful video. I need to replace my fuel pump and this video made me understand a fuel pump and it’s parts a lot more.

[@speedkar99]

Thanks. Are you just replacing the motor and filter, or the entire unit?

[@goddamnadam623]

speedkar99 I’m replacing the whole unit. It’ll be my first time replacing a fuel pump so hopefully it goes well.

[@pinkisforpimps]

Could the fuel filter be replaced with your brother's sock?

[@speedkar99]

+joshuag94 yes.

[@speedkar99]

+joshuag94 in fact I am literally using my brothers sock on my vacuum right now because I can't find the right filter size.

[@MortifiedU]

awesome, blew up the water pump on my portable shower (4wd ing around Australia), so got a fuel pump from the wreckers and pulling apart to replace the motor.. Should get a bit more pressure out of it as well. Cheers.

[@speedkar99]

+Aaron Kent make sure you through rinse it since it's been emersed in fuel

[@MortifiedU]

Sure will, degreased, detergent, vinegar soak and then bicarb to nautralise the vinegar..

[@renelbernardino9889]

Entry and exit of fuel got mixed up.

[@glasser2819]

... is the pressure regulator after the filter media, right?

[@TheTauri777]

This explanation is wery good. Many thanks to you. Now I understand how remove fuel pump from the fuel filter. Today I removed fuel filter from fuel tank, but I don't understood how remove bad fuel pump from the fuel filter.

[@speedkar99]

+Tauri Pikpoom Thanks. Glad my video helped

[@Sychonut]

Dude has PhD in fuel pumps..

[@speedkar99]

+Sychonut No I only have a masters degree

[@SamMan1776]

This is how people should explain things Great work

[@Yathuprem]

Give away Tooth brush at 1m subs !!

[@speedkar99]

+Yathu prem Haha good idea Or how about a video on what's inside a toothbrush and how it works?

[@Yathuprem]

speedkar99 That would be awesome

[@voxpopuli735]

It couldn't be better!!! The best video ever!! Thank you very much!

[@speedkar99]

You are welcome

[@ivanm.3522]

Thanks, very nice video to understand insights of a fuel pump. I found very valuable to see the pumping volume while working and also the working principle of the filter fuel bypass valve.

[@firemedic2714]

Outstanding video! I'm showing this to my children so they understand why they shouldn't run their cars down to empty. LOL.

[@PenthouseBaking]

Dude! You are the best! Toothbrush caught me off guard. but I dig it. Thank you for the explanation, keep 'em coming

[@speedkar99]

+Ekaterina Koroleva thanks I'm glad you enjoy my video. Check out my other videos for more toothbrush

[@THX11380]

You mix some of the best automotive videos I've ever seen in my entire life epic awesome information wonderful job

[@speedkar99]

You are welcome

[@MarioGonzalez-sl1yi]

Thanks for explaining bro 🙏🙏

[@speedkar99]

Always welcome

[@Fireneedsair]

You answered everything in the text. Thanx again.love your videos

[@speedkar99]

Thanks

[@Gans9198M]

Hats off to you hardwork to explain all these stuff

[@speedkar99]

Awesome thanks

[@Joeelectronicschematicsforauto]

You make the best videos anywhere but man you are brave to do this without gloves

[@eltonwright399]

I like that you get to the point, I think most people that post videos just like to hear themselves talk. Good Job!!!

[@speedkar99]

Glad you appreciate my video style

[@William_Mobley]

This is the greatest KZbin video I've ever seen! It's like Tesla and Bill Nye made a test tube baby with the two guys from Car Talk! Lol!

[@speedkar99]

+William Mobley haha thanks for the feedback , feel free to check out the rest of my videos for more like this!

[@tangoboy4jc]

Excellent dissection of this device.

[@speedkar99]

+Tanitoluwa Oyegoke thanks

[@manishpandey1157]

Very good demonstration. Excellent

[@redmouse6346]

You guys are amazing. Short of breaking open the wire- damn you showed the system in detail. Great job.

[@Masteradamant]

I have that exact fuel pump assembly. Those were the easiest to work on;however you go above and beyond by slicing up the pump and showing us the guts.

[@speedkar99]

Thanks. This pump is used in Many different Toyota models

[@Masteradamant]

@@speedkar99 I like the larger filter but the Philips screw driver bolts needed to go. That was a design I didnt mind because those bolts get stripped too easily. Now you just need a hammer.

[@saketjoshi4476]

This guy is 4 years of automobile engineering degree in videos. I learn here much more than I do in college.

[@speedkar99]

Thanks. Unfortunately I didn't learn any of this in my engineering degree

[@saketjoshi4476]

@@speedkar99 heyy! Yes definitely. This knowledge is never found within the textbooks. But only if one knows this practical stuff (that you do), he is assumed to be a good automobile engineer. And this knowledge comes with hands on experience only. Ironically.... Btw you are a legend 💯

[@saketjoshi4476]

@@speedkar99 btw, Today is engineer's day! My greetings to you brother 😊

[@thewholls7176]

Never seen a toothbrush used as a pointer before quite interesting..... Think the variable resistor is called a potentiometer....... Also before you take the pump out good idea to blow the top of the tank with compressed air before you remove it otherwise all the junk and dust and rust will drop into the clean fuel tank... Good video I like seeing things taken apart like that it’s very helpful and for the most part all the different models of car doesn’t matter the fuel pumps are essentially similar....

[@speedkar99]

Good tips.... though if you see my EVAP system video, the tank was cut apart to see what's inside.

[@fahimhasnain]

Interesting....you must deliver same to university students....knowledgeable ...thumbs up

[@leszek9918]

Fantastic video. I learn a lot from your videos. The best automotive staff at whole KZbin. Great job.

[@speedkar99]

+Leo Asahi thanks I'm glad you enjoy them.

[@jobinjoseph50]

Very informative video , the fuel level low sensor I think is a heated resistor and ecu check the resistance change, when fuel is not touching the resistance it gets more heated and increasing the resistance indicate low fuel level.

[@speedkar99]

I think it's just based on resistance. Nothing to do with heat given how it's wired.

[@gman000]

this Video was a hidden Gem. Very good. Allot of info and 1st hand observations.

[@adornthangoministerofdeliv3686]

This guy should be a professor really he's good 👌

[@speedkar99]

Everyone says I should be a teacher haha

[@krishnakanth3004]

Very good explanation of electric fuel pump Crisp and concise !

[@speedkar99]

Thanks! Glad you found it helpful

[@abdelmounimhamdaoui8096]

Nice, quick and very informative. I like the way that you open everything and explain and do all this quickly.

[@speedkar99]

Thanks. Short and to the point is my style

[@glasser2819]

@@speedkar99 the good thing is you consitently do that with a LINEAR LOGIC that is easy to understand, your trade mark ! 🤗

[@OYE.2003]

If I could like this video 100 times over I would, thank you for the video!

[@subhash5715]

This video is the real example for those who make this type of videos. Really excellent video

[@speedkar99]

Thanks so much

[@screwsnutsandbolts]

Great video ! 👍

[@pen2prasath]

Amazing work Speedkar99 ..cant appreciate in words !

[@mbox314]

This is one of the best edited videos on youtube, consice, informative and not one wasted second.