How to Test For a Bad Brake Booster / Brake Booster Testing

Рет қаралды 1,468,562

4 жыл бұрын

In this video show how I test for a bad brake booster and check valve. Testing a brake booster for leaks is pretty easy and doesn't require a bunch of tools. The exact vehicle in this video is a 2002 Toyota Tacoma pickup truck. Enjoy!
P0171 diagnosis on this truck: • P0171 Trouble Code: Sy...
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Tools used:
OTC 5213 pressure/vacuum gauge: amzn.to/2GZJgVM
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The Big Dog50001 Automotive Channel recommends safe practices when working with power tools, in on or around automobiles or other vehicles, automotive lifts, lifting tools, jack stands, electrical equipment, automotive modules and systems, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of the Big Dog50001 Automotive Channel, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not the Big Dog50001 Automotive Channel.

Пікірлер: 709

@BigDog50001 Жыл бұрын

Check out The Accord Project videos! Link to Part 1: kzfaq.info/get/bejne/h5t2iLl7uamono0.html Link to Part 2: kzfaq.info/get/bejne/gr6XfsWcm66lcnU.html Link to Part 3: kzfaq.info/get/bejne/pbpjhNp0mq2vmGw.html Link to Part 4: kzfaq.info/get/bejne/rNOGZ7GD2669iGQ.html Link to Part 5: kzfaq.info/get/bejne/gLp_qtWLlsncpGg.html Link to Part 6: kzfaq.info/get/bejne/rKqHq5pkqa2Xl40.html Link to Part 7: kzfaq.info/get/bejne/sLGpnpZhudGvnps.html Link to Part 8: kzfaq.info/get/bejne/rsWhZ8ReqdCoiqM.html Link to Part 9: kzfaq.info/get/bejne/rpOEdJOGndm9ZKM.html

@bramblewoodhall4757 Жыл бұрын

Brilliant! Greetings from rainy England. I was stuck trying to fix my brakes on an Audi A6, which would work fine but occasionally suddenly fail. This was not improving marital harmony. I watched your video, where you explain how the servo assist system works and how to test for faults. Armed with this knowledge, I strode manfully to the carpark, where I had abandoned the dangerous car. Problem solved! - the vacuum feed pipe was not tight in the rubber tube that goes through the bulkhead to the brake servo. I wrapped ptfe tape round the serrated pipe end to make a tight seal and added a tie wrap round the rubber pipe to stop it coming off. The brakes work much better now. It was knowing how it worked that enabled me to diagnose and then to fix the fault: thanks for sharing the knowledge.

@eddiemercado9310 Жыл бұрын

Thank you for sharing this information with us 🇺🇸

@Bozemanjustin 2 ай бұрын

6:07 mine is firm with the car off, turn the car on drops almost all the way to the firewall

@gvjester 6 ай бұрын

WOW!! Learned more about brakes in this 10 minute video than in the last ten years! You are the brake GOAT! MANY THANKS!!

@ryszardjacekrusniak7993 2 жыл бұрын

It explains EVERY aspect of testing the brake booster. Thank you,

@BigDog50001 2 жыл бұрын

Thanks 👍!

@GunnersRange 2 жыл бұрын

I love the way you explained everything. You did this better than most other sites on KZfaq. THANK YOU!

@BigDog50001 2 жыл бұрын

I appreciate the comment, thanks!

@jimmypage4162 3 жыл бұрын

Couldn’t have done it better myself excellent video sir! Every possible easy way to check the booster/vacuum/master cylinder system. Thank you

@1LeMec 3 жыл бұрын

Just helped me diagnose a the problem. Saved me from buying parts I didn’t need and some frustration. Many thanks!

@BigDog50001 3 жыл бұрын

Glad it helped, thanks for the comment!

@grand73am 3 жыл бұрын

Excellent advice. Helped me diagnose my booster. Thanks!!

@lendanhoke9066 4 жыл бұрын

Very well explained. Appreciate the accurate information! I Wish school teachers knew/explained their curriculum this well.

@BigDog50001 4 жыл бұрын

Thank you, I appreciate the comment!

@capitanvonchickenpants8492 3 жыл бұрын

They do! That's why our kids are becoming commies

@darkskinwhite 2 жыл бұрын

@@capitanvonchickenpants8492 I see what ya did there lol. agree. also doesnt help they encourage little boys to think they're girls.

@TheKonakairay 2 жыл бұрын

@@darkskinwhite look up yuri Bezmenov

@sergedenovo2389 Жыл бұрын

BY FAR, the best video on the subject that I have found. Sincere thanks! Serge in Chicago. Imma go see!

@225dog3 3 жыл бұрын

I know this is an old video but I just want to say dude you just help me out a lot this video will help people for years to come

@BigDog50001 3 жыл бұрын

Glad it helped, thanks for the comment!

@glasscitysocialclub 3 жыл бұрын

It just helped me. Been driving myself crazy trying to figure out why my van only runs right when the booster vacuum hose is disconnected.

@HomeMadeBoards 3 жыл бұрын

10/10 mate. Straight to the point, great, simple, yet vital information other channels aren't addressing.

@BigDog50001 3 жыл бұрын

I appreciate the comment, thank you!

@gunsofsteele Жыл бұрын

Thanks for the video! Releasing the clips meant my wife had to assist to pull the switch out while I pushed the keeper clips in. Nothing like fumblefarting my way through it. 😂 2009 Chevy Avalanche. Key positions; all the way counterclockwise = Lock, 1st = Acc, 2nd = Run, 3rd (spring loaded) = Start. This truck does not turn counterclockwise for Accessory. Thanks again!

@DanOnFire 2 ай бұрын

I think everybody else has already said it: you do a fantastic job explaining the how and why of each simple test. Thank you!

@BigDog50001 2 ай бұрын

Thanks 👍!

@4bangerftw 4 жыл бұрын

I have to pass a knowledge exam soon to change class as a mechanic and your video are very helpful, you are a great teacher.

@BigDog50001 4 жыл бұрын

I appreciate the comment, thanks!

@madinanababi8094 2 жыл бұрын

@isjesse1 4 жыл бұрын

Thank you so much for being so clear

@ronniephillips4598 2 жыл бұрын

Wow, to the point and very professional, I was able to check some things while actually watching this video…great content I will be following you from now on!!!

@BigDog50001 2 жыл бұрын

Thanks and welcome!

@dr.drewskii8823 3 жыл бұрын

This video was very helpful!! Thanks big dog!!

@John-wx3zn Жыл бұрын

I am impressed by your football acheivements. Congratulations. You were a part of an amazing team and you are an amazing man to help people with your education. Thank you for this awesomely articulated video. Your shared education on this matter is a big help to me. I hope more people that make videos share their sports acheivements at the beginning like you did. Go Laney!

@mckoylach1622 4 жыл бұрын

Great demonstrations of the diagnostic procedures,thanks for the video....

@BigDog50001 4 жыл бұрын

Thanks for the comment!

@robertt3551 3 жыл бұрын

This helped me out and saved me from a $300 repair job. Thank you!

@BigDog50001 3 жыл бұрын

Glad it helped, thanks for the comment!

@brianpeacock9444 2 жыл бұрын

I am an A.S.E. tech and this is an excellent video for b-booster fault trouble shooting.

@BigDog50001 2 жыл бұрын

I appreciate the comment, thanks!

@feliperigau7353 Жыл бұрын

Very informative! My fluid level was down below minimum but after topping it off the light remained on. The dealership recommended tapping the reservoir to free the measuring arm in the reservoir. IT WORKED!! LIGHT OFF!!

@BigDog50001 Жыл бұрын

👍

@deepramgariadhiman9875 4 жыл бұрын

Good job Sir it's a perfect example to Check Boosters .I do it as you do

@BigDog50001 4 жыл бұрын

👍

@kengardner5097 2 жыл бұрын

Excellent vid Big Dog50001 Professionally done.

@BigDog50001 2 жыл бұрын

Thanks for the comment 👍!

@lancecluster Жыл бұрын

Nice video, Seems to apply to my older volvo xc90, thank you for making this

@robadventure8007 2 жыл бұрын

Very well explained, very helpful. Thats exactly the problem of my break!👍👍

@BigDog50001 2 жыл бұрын

👍

@markboymer9988 Жыл бұрын

Great video on simple brake booster vs master cylinder testing for brake issues

@BlackDomeJerome 4 жыл бұрын

Very informative and easy to understand. Thank you

@BigDog50001 4 жыл бұрын

I appreciate the comment, thanks!

@charliediver1560 2 жыл бұрын

Another very helpful video thanks for posting .

@BigDog50001 2 жыл бұрын

Thanks 👍!

@markstevens7709 8 ай бұрын

This helped me out so much, best video regarding the topic

@BigDog50001 8 ай бұрын

Thank you, I appreciate the comment!

@dustinwilce1766 Жыл бұрын

Great video bro keep it up this helped me diagnose and fix my brakes

@JuanDiaz-pq4wb 3 жыл бұрын

Thanks to your great video I was able to realize that the defect of my toyota tacoma is that the vacuum brake booster does not work well and I replaced it and fixed it. Thanks you very much for sharing your knowledge and experience. Thanks sss👍👍👍👍👍

@BigDog50001 3 жыл бұрын

👍

@georgemitchell7420 3 жыл бұрын

Great help and simple to understand! thank you.

@BigDog50001 3 жыл бұрын

Glad it was helpful, thanks for watching!

@belowfray5251 Жыл бұрын

Thanks so much. Great reminder of how to check valve

@marcusdarnell3348 4 жыл бұрын

Thanks big dog this helped me out a lot!

@BigDog50001 4 жыл бұрын

Glad it helped, thanks for the comment!

@angelmoreno8000 9 ай бұрын

Great video sir. Keep up the great work!!!

@iRepairElectronics Жыл бұрын

Great set of tests. My old truck must have a bad booster, when i press hard enough i hear it hissing and the engine RPM’s drops down. Lol 😂

@eddieesquivel1685 2 жыл бұрын

I had recently replaced a fitting that fixed a vacuum issue (fitting on manifold) that had turned on check engine light. Parts store clerk said it was for brakes and whether I was having issues. We weren't, but the check engine light was on for vacuum issue. Light went away when fitting was replaced, but came back on several days later (I did not reset light, it just turned off when fitting replaced). Diagnostic showed no errors, but history showed brake issue. It's clear now. Video helped explain how vacuum loss could cause the "brake" check engine light issue. Thanks.

@BigDog50001 2 жыл бұрын

👍

@Ingyar Жыл бұрын

Nice explanation. Thanks! 👍

@blujan52 3 жыл бұрын

Nice video, clear and easy to follow.

@BigDog50001 3 жыл бұрын

Thanks 👍!

@steveplowman4005 2 жыл бұрын

Great info! Off to diagnose my problem. Cheers Steve

@dimitrig3739 2 жыл бұрын

Good, thorough explanations

@matthewhomer9369 3 ай бұрын

Great guy very good teacher helped a lot Thank-you.

@MrLESRAJ 3 жыл бұрын

Excellent video, on all tests, thank you.

@nune44 4 жыл бұрын

Thanks for the knowledge man.

@BigDog50001 4 жыл бұрын

I appreciate the comment, thank you!

@boatkid888 2 жыл бұрын

Outstanding information! Thank you!

@BigDog50001 2 жыл бұрын

Thank you, I appreciate the comment!

@kabunyankim7751 2 жыл бұрын

Thank you very much! Very informative video that answered my questions . God bless!

@TruckerReviewed 3 жыл бұрын

This was very informative

@charlesdryg8452 Жыл бұрын

Excellent diagnostic demo.

@BigDog50001 Жыл бұрын

Thanks 👍!

@charlesdryg8452 Жыл бұрын

I attacked the problem as demonstrate and I won big-time. The first thing was to test the one-way valve. Bingo. On my valve there is a side tap to allow for an easy system vacuum check. It has a rubber slide on cap to seal it when not in use. On mine, the rubber cap had totally rotted to failure. Easy $4 fix. Thanks a bunch.

@krisztianadrian8528 Жыл бұрын

Thanks a lot ... Very good explanation..👍 I will do some checking

@EllisIsaacks 9 ай бұрын

GREAT video I never knew how to check.

@donchan1622 2 жыл бұрын

Awesome video great details and straight to the point…..! Love it man thank your…!

@BigDog50001 2 жыл бұрын

Thank you, I appreciate the comment!

@andyclemente4205 3 жыл бұрын

Thanks for the video. Very informative

@BigDog50001 3 жыл бұрын

I appreciate the comment, thank you!

@haxificality 2 жыл бұрын

very informative. thanks for sharing!

@BigDog50001 2 жыл бұрын

Thank you for the comment!

@GMoney-B Жыл бұрын

I have bled my brakes 3 times for squishy pedal syndrome. The third time I bled my brakes I used a pressure bleeder and my brakes were great and fine for a couple months until today when the squishy pedal came back. I didn't think it was the master cylinder because it would get better and not come back after bleeding the brakes. Each time it would come back, it would seemingly happen over night. I did the last test that you described to do that tests your master cylinder, with the engine off. I pumped a bunch of times(6 or 7) to get rid of vacuum in the brake booster, then I held the brake for 15 seconds. My brake pedal held firm and didn't sink, it did do a really weird thing though after 15 seconds of having this very very slow pulsing that would push my foot back very very slightly almost not noticeable. It would push back for maybe 5 seconds in a gradient pulse, and then go back that same amount. Again, my engine was off, and the distance it pushed back was so so so small so I would think it wouldn't be an issue, but I also never expected it to have a gradually sweeping pulse pushing my foot back when the engine was off. I would think it is air in my system, or a leak? What do you think? If anyone else has any ideas or experience with this, I would really appreciate any expertise! Really wanting my brake gremlins to be stomped out after maybe 4-5 months of this now.

@BigDog50001 4 жыл бұрын

This video shows how a bad brake booster can cause a check engine light kzfaq.info/get/bejne/iduXp7VlsLOtdIk.html

@-g.k.4389 4 жыл бұрын

Everytime I hope my brake booster hose to the plenum it stalls out but when I understand hook it it starts up

@najeeaugustine1610 2 жыл бұрын

I've changed the whole driver side for my brakes on my Honda pilot it's the only side not releasing why is dat

@guybolton6903 Жыл бұрын

@@-g.k.4389 +qq+

@mrkttrdr2919 Жыл бұрын

thanx, nice thurough explanation for all tests

@richardprice7107 5 ай бұрын

Thank you! Not sure what I liked more...the tutorial or the detailed explanation! I'm on my way to properly diagnosed my brake booster!

@BigDog50001 5 ай бұрын

👍

@arthurfricchione8119 4 жыл бұрын

Dave, excellent video. I noticed that Big Dog 50001 coffee mug in the beginning. If you have any extras I would love to support your channel. Your videos are excellent. Thanks for your time and effort.👍👍👍

@BigDog50001 4 жыл бұрын

Thanks Arthur, I appreciate the support! I will let you know if I get extras.

@TheDisgruntledMechanic 4 жыл бұрын

You do love your coffee mugs Arthur! haha!

@arthurfricchione8119 4 жыл бұрын

Mike what ever gets us thru our day. You know what I mean. Take care bud 👍

@TheDisgruntledMechanic 4 жыл бұрын

@@arthurfricchione8119 yes sir! And I appreciate it!

@cksanford9897 3 ай бұрын

GREAT video sir and thank you.

@BigDog50001 3 ай бұрын

Thank you for the comment!

@nonnoziccardy4353 Жыл бұрын

Great explanation and video!

@BigDog50001 Жыл бұрын

Thanks for the comment 👍!

@cedarbreezewoodwork 11 ай бұрын

very nicely done! thank you

@capncharlie7894 Жыл бұрын

great video thanks for sharing your expertise

@shanemike3070 Жыл бұрын

That was very helpful, thanks

@samuelhelderman 2 жыл бұрын

Thanks so much. I liked it so much I subscribed!

@BigDog50001 2 жыл бұрын

Thanks and welcome!

@jeffbeguinmusic7157 3 жыл бұрын

Fantastic video - thank you!

@BigDog50001 3 жыл бұрын

Thanks!

@rjmlondon 8 ай бұрын

Excellent and informative

@jossefjossikajit4169 8 ай бұрын

FANTASTIC TEACHING ❤

@itzikvil1 10 ай бұрын

amazing movie so informative and so concise thanks again I am going to apply to my car :)

@danreynolds8028 3 жыл бұрын

Fraekin' Great job, Man. Now I know how these puppies work. Liked and subscribed!

@BigDog50001 3 жыл бұрын

I appreciate the comment, thank you!

@danreynolds8028 3 жыл бұрын

@@BigDog50001 I meant "Freakin".... When your spelling starts to go bad, you know you're getting old... Keep up the great work!

@ashfaqattar8801 2 жыл бұрын

Very well explained... nice information.... thank you...

@BigDog50001 2 жыл бұрын

You bet , thanks for watching 👍!

@JoseMedina-jn3nj 2 жыл бұрын

Congrats! Excelent video I understand petty much everything you said sr I like the way you explain very profesional with no loud music back ground.. thanks..

@BigDog50001 2 жыл бұрын

Thanks 👍!

@dapoutdoors 2 жыл бұрын

🤜🤛 great teaching bro

@denk25143 2 жыл бұрын

yes this help it was master cylinder and now i learned how to appreciate a power booster

@_suprasteve_2186 2 жыл бұрын

Good stuff man!

@BigDog50001 2 жыл бұрын

Thanks 👍!

@Nyck461 2 жыл бұрын

Great video. A lot of details.

@BigDog50001 2 жыл бұрын

Thanks 👍!

@dagorilla5177 2 жыл бұрын

Great job 👏🏾

@BigDog50001 2 жыл бұрын

Thanks for the comment!

@bobbylong2202 2 жыл бұрын

Thanks this gives me somewhere to look

@allahonfingerprint3800 10 ай бұрын

Thank you Very informative

@charlesmicallef4673 10 ай бұрын

Really good video!!!

@marcior.2153 Жыл бұрын

Thanks Big Dog50001. ;)

@Nookends 5 ай бұрын

Awesome video thank you!!!

@BigDog50001 4 ай бұрын

👍

@BPerez-ou6ux 3 жыл бұрын

very very helpful. Thanks!

@BigDog50001 3 жыл бұрын

Glad it helped, thanks for the comment!

@paulc2548 Жыл бұрын

Thanks for sharing the video! I have a 2008 Highlander and has spongy brake and the brake pedal sank almost to the floor. I will do some tests :).

@richramos2689 4 жыл бұрын

Good information. Thank You.

@BigDog50001 4 жыл бұрын

I appreciate the comment, thanks!

@screwsnutsandbolts 3 жыл бұрын

Excellent videos 👍

@BigDog50001 3 жыл бұрын

Thanks 👍

@screwsnutsandbolts 3 жыл бұрын

@@BigDog50001 You're welcome !

@stephenwalford774 2 ай бұрын

Great info..thanks

@elcoyotecojodeldesierto2300 3 жыл бұрын

Very helpful video.

@BigDog50001 3 жыл бұрын

Thanks!

@victorgarrett8795 9 ай бұрын

Right on man thank you so much!

@Zib187 4 жыл бұрын

Excellent info!

@BigDog50001 4 жыл бұрын

Thanks!

@natanaelcalderon3937 Ай бұрын

Thank you, following your instructions I determined the issue was the master cylinder. Replaced the master cylinder on my 2010 acura rdx and it no longer sinks.

@surgeneral108 4 жыл бұрын

Excellent video, perfectly explained

@BigDog50001 4 жыл бұрын

I appreciate the comment, thank you!

@mikedavis1069 9 ай бұрын

To "THE" point... Great vid thank you Sir...

@jimlawson1953 2 жыл бұрын

I'm wondering if you have any deaf people in your family. The way you communicate through you hands is phenomenal. Thank you.

@AreaCode862 11 ай бұрын

Well done 🤝💪

@barneygordon2585 Жыл бұрын

GREAT VIDEO THank you

@rosskothe1897 2 жыл бұрын

Awesome video thankyou sir

@BigDog50001 2 жыл бұрын

Thanks 👍!

@xr500t 3 жыл бұрын

First of all, Niiice hair! .... I ran into an unusual situation. Brake booster on a Jaguar x-type pretty much tested bad while sitting at rest test (after shutting off engine). One decent brake feel the next one almost hard as a rock and the third one rock solid, essentially not holding vacuum for enough braking. The check valve tested ok, brake pedal dipped when starting engine, so all ok until the test for the vacuum being held after engine shutoff. Lastly, the brakes themselves were dragging severely. So, I removed the Master cylinder and adjusted the push rod length. (the moment I took off the master, I could tell the brake pressure released) I had to do it twice, but worked like a charm the second time around. There's an acorn nut at the end of the pushrod (I had a helper step on the brake to extend the pushrod) I then used a needle nose vise grip to keep the pushrod (just behind the acorn nut) from turning and turned the nut in at least 6 turns in my case. The wheels spun freely and the car ran flawless. The car was struggling to shift as well, the ABS light had come on too. But it all re-set to normal after my stint. Like I said way unusual, and a first for me on this adjustment.

@BigDog50001 3 жыл бұрын

lol! (on the hair) 😀