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Mass air flow sensor (MAF) testing without dismantling 

TutoBuild Eng
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How to test your mass air flow sensor (MAF) and to quickly know if it is defective. Mass air flow sensor testing with a multimeter without dismantling. Method applicable to all vehicles. Mass flow sensor, mass flow meter
Auto, automobile, car, vehicle maintenance tools parts accessories engine mechanics do-it-yourself diy tutorial tuto
This video does not constitute or replace a real specialized technical manual, and was only made ​​for convenience and educational purposes. "TutoBuild Eng" makes no warranties of any kind and accepts no liability. "TutoBuild Eng" cannot be held responsible for any damage caused to devices or persons using information contained in this video. The use of the information contained in this video is at your own risk.

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2 июн 2014

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Комментарии : 254   
@discgolflife
@discgolflife 3 года назад
Just replace the sensor after 50 k miles. It's easier to unscrew the two screws and unplug the clip lol. If your car dies when starting it, slow and sluggish when accelerating, or has trouble shifting just replace this sensor folks! It's the brain between the transmission and motor. It's worth the money just do it lol! You're technically supposed to clean your mass air flow sensor and replace the air filter every 15k miles. Those sensors are super sensitive and are easily damaged. I replace the mass air flow sensors on my 4 vehicles every 40k miles! Change the plugs every 50k miles as well! Basic maintenance brings longevity folks! Much love peace!!!!!!
@2manycatsforadime
@2manycatsforadime 6 лет назад
This was the best vid I have found to test a MAF. I followed all the steps, identified all the wires, got the earth pinned then found the 5V wire. While running the MAF came up from .01V to .05V but no more. Diagnose bad MAF, now I can purchase a replacement confident that I am not just replacing good parts with new parts.
@CharlesKeyz
@CharlesKeyz 2 года назад
Perfect video. Got right to the information. Most straightforward car repair video I’ve ever seen. I wish everything on youtube was this straight forward.
@kristopherhasenbuhler5393
@kristopherhasenbuhler5393 5 лет назад
This is by far the most simple video to understand!!!!! Thank you so much i plan to test mine in the next 5 minutes
@sr05051986
@sr05051986 7 лет назад
I checked lots of vlogs ,but your one is the best! Thanks man👍
@happycat0411
@happycat0411 10 месяцев назад
Great video! However, a MAF sensor may still work but not perfectly. This is a good overall test if the MAF sensor for your car is quite expensive and one should always try to test the MAF sensor before replacing the sensor. Most licensed professional mechanics cannot diagnose car problems today either and what ends up happening is they just replace everything possible and foot the bill to the customer. If people want a car that they can maintain themselves, buy something made around 2000 ~ 2005 as vehicles made during this time had a computer just to control ONLY the engine and transmission. After 2005 car manufacturers integrated sensors into everything electrical they could think of, making it a nightmare to diagnose and find the exact problem.
@OKAZWA44
@OKAZWA44 7 лет назад
Than you Sir for the info.This remind me of how we used to test fuel level gauges in cars using analogue multi meters ..cheers
@saleemkader2126
@saleemkader2126 9 лет назад
very nicely explained very clear . Thank you . I wish we had youtube in my younger years i would have learnt much more , younger people don't know how lucky they are. Some people give bad comments they are a pain in the bum they are sad people.
@soundguy1031
@soundguy1031 8 лет назад
+Saleem Kader too true, id be king of the world if i had the RU-vid and internet in my youth. i read encyclopedias and dictionaries for all my info..
@samc.3405
@samc.3405 7 лет назад
Thanks for te video. Basic and straightforward. Very helpful!
@andysouthern1699
@andysouthern1699 8 лет назад
Great video. Careful you don't short between 0v and 12v when you put the pins in. Risk blowing a fuse (minimum)!
@johndombrowski3225
@johndombrowski3225 7 лет назад
I LOVE ALL YOU GUYS who make these great videos. you're all going to heaven!
@edgarortiz5145
@edgarortiz5145 4 года назад
Thanks for sharing this to us, it's very useful!
@BigBird-jn1gz
@BigBird-jn1gz 8 лет назад
Very helpfull. the other comments are just people picking the guys video apart. very helpfull
@carlosrayalam2111
@carlosrayalam2111 5 лет назад
I'm still learning
@emmanuelkodzoavekor1309
@emmanuelkodzoavekor1309 2 года назад
@@carlosrayalam2111 Hello
@dannil8594
@dannil8594 9 лет назад
at least he tried.... well done mate! computer translate makes no odds to me!
@ellobo761
@ellobo761 5 лет назад
Thanks for the info!
@felixzin6545
@felixzin6545 5 лет назад
Great video mate
@josepeixoto3384
@josepeixoto3384 4 года назад
Attention: this video is ONLY for --analog-- MAFs; DIGITAL MAFs output a *frequency* ,not a voltage; you'll need a scope or at least a multimeter with Hz,Hertz. Thanks for the video.
@goober650NX
@goober650NX 8 лет назад
Good job. Thanks for the post.
@jsaav
@jsaav 5 лет назад
Helpful have a check engine light I think this is the cause !! Thanks
@vingianni
@vingianni 7 лет назад
Your video is excellent, direct and to the point, good camera work and explanation. Do not pay any attention to anyone that criticizes your audio. They are idiots.
@Ashroyer86
@Ashroyer86 9 лет назад
Just don't let the needle nose touch the 2 nails simultaneously with the key on.
@damonlemay9979
@damonlemay9979 Год назад
Adios maf and a few other fun replacements
@kingofkisses2008
@kingofkisses2008 Год назад
Short and sweet, many thanks for sharing.
@BashDeCash
@BashDeCash 4 года назад
Very great video and very helpful. Thank you and thumbs up!!!!!!!!!!!!!!
@josezuniga1883
@josezuniga1883 3 года назад
Thanks for share your knowledge with us.
@tobiaslooser
@tobiaslooser 8 лет назад
rockin the auto tune bro!
@sproulman1
@sproulman1 7 лет назад
Very good test ..real easy .thanks..
@basher1592
@basher1592 3 года назад
The MAF sensor has a voltage range that it performs in, so if the MAF sensor is not performing in the manufacturer's range then it will bot work properly.
@jefferylim1806
@jefferylim1806 7 лет назад
thanks for your sharing👍
@amanwithhiscigaretteandcof3474
@amanwithhiscigaretteandcof3474 3 года назад
Thank you sir !!
@jfporrasg
@jfporrasg 7 лет назад
EXCELLENT!
@trabadix
@trabadix 3 года назад
Thanks a lot!!!
@user-kd1lp8wd2q
@user-kd1lp8wd2q 6 лет назад
thank's a lot very help full.......
@MuhammadAslam-fn5wm
@MuhammadAslam-fn5wm 6 лет назад
Very very nice u are great sir
@TheofanisPapadopoulos
@TheofanisPapadopoulos 3 года назад
Great video
@gunawan91270
@gunawan91270 6 лет назад
very very helpfull
@JohnsonkeyzMusicAcademy
@JohnsonkeyzMusicAcademy Год назад
So perfect I’ll try this
@JPTHRICE
@JPTHRICE 6 лет назад
its a good video!
@Robsam28
@Robsam28 Год назад
Thanks much very good video
@KAZALO9
@KAZALO9 7 лет назад
i have a question please , I have a 93 mustang 5.0 and Im seeing 13 volts on the signal in and out wires its a brand new pro M WHat could be causing such high readings??? I know I should only be seeing 5 at max!!!
@ZakanaBouriza
@ZakanaBouriza 6 месяцев назад
Dang bro you nailed it 🎉
@mdazimushan4612
@mdazimushan4612 Год назад
thanks a lot
@rysun8709
@rysun8709 8 лет назад
How do you rate your multimeter. I'm thinking of getting one like it but I haven't seen much reviews.
@canadapainter658
@canadapainter658 Год назад
good job,,,thanks..
@djmikesea
@djmikesea 6 лет назад
my truck died while driving, is there a way to test this with engine off ? i was getting mas error code b4 it died ? its not getting fuel, tries to start when spraying starter fluid into intake. tried cleaning it, but no difference, it just might be dead, but would the mas keep your engine from starting ? i have a 2007 toyo tacoma 4.0 4x4
@johngreenlaw3162
@johngreenlaw3162 2 года назад
I have this problem 07 tundra, replaced both the MAS and the ignition coil. Still doing it randomly. If I disconnect the battery and reconnect it starts normally for a while. Any tips will be appreciated.
@reneguerrero4512
@reneguerrero4512 6 лет назад
Very helpful but have to understand the numbers to know if it sending the right signals.. because it's it bad then the reading is going to be low..
@freesaxon6835
@freesaxon6835 7 лет назад
good video
@dennisarterburn18
@dennisarterburn18 8 лет назад
CAUTION.....first video I found said to clean with carb cleaner, I did and ruined the MAF.....I later learned that you should only use a cleaner made for MAF sensor cleaning. Any other cleaner can at the least leave a residue, and at worst remove the teflon coating on the MAF....this is a very sensitive sensor.....just my experience....all parts stores carry the MAF cleaner, and just as cheap as carb or brake cleaner, so why not use the one that is designed to do the job, rather than take a chance. Hey other cleaners may work on some MAF sensors...they all do the same job, but are designed and made with different materials....not worth taking a chance using anything other than a cleaner made specifically for cleaning MAF sensor
@robotmad
@robotmad 6 лет назад
Dennis Arterburn yep me too carb cleaner destroys this and the MAP Sensors.
@stivi739
@stivi739 5 лет назад
u need a circuit cleaner spray can
@LoLzZ85
@LoLzZ85 2 года назад
MAF cleaner is the most expensive of the lot
@BamaTony73
@BamaTony73 Год назад
Use Zep mass air flow cleaner or if you don't have thar use rubbing alcohol. That's all I use. Alcohol doesn't leave a residue so you can use it if you can get it spraying in a jet stream.
@modimaruti5874
@modimaruti5874 5 лет назад
Great informative video sir 👍 👍 👍 great work sir 👍 👍 👍 best regards for the future videos sir 👍 👍 👍
@joskhan2443
@joskhan2443 5 лет назад
good job.......
@Mobilematt69
@Mobilematt69 9 лет назад
Got my mass air flow sensor from vehiclevaluepart's website. This video helped me realize it went bad. I ordered mine and got it in the same week. Oh and it was the best price I could find.
@petarmaksimovic4048
@petarmaksimovic4048 9 лет назад
Mobile Matt Nobody cares where you got your maf, how much you paid for it, how fast it arrived or if you got rebate. This is not a shopping site. We don't even know what car you own, what engine, on what continent or country you live in.
@Mobilematt69
@Mobilematt69 9 лет назад
Rude.. And I was just giving my experience.
@petarmaksimovic4048
@petarmaksimovic4048 9 лет назад
Mobile Matt Rude or not you just gave us your experience with some random online seller, nothing to do with maf, testing, symptoms of it going bad etc...
@petarmaksimovic4048
@petarmaksimovic4048 9 лет назад
Mohammad Mezher I'm just a little annoyed by people (mostly American's that assume that only Americans have access to internet) that just comment on where they purchased something online and how fast it arrived.
@DJMATRIXVIDEOBLENDZ
@DJMATRIXVIDEOBLENDZ 9 лет назад
Petar Maksimovic Dude he got a new maf after diagnosing the issue after watching this video lol I too have just done the same but I got a secondhand one from a friend.
@marks7352
@marks7352 5 лет назад
WOW! Thanks for this video...I'm new to all this stuff. I'm learning....Thanks again. I'd like to know symptoms of problems to help with diagnosing
@glenmckelvey5952
@glenmckelvey5952 4 года назад
My Frontier only as three wires on the MAF will the test work the same way .
@cesarjorgemurillobarientos1813
@cesarjorgemurillobarientos1813 2 года назад
very good
@watcherwatchmen7785
@watcherwatchmen7785 6 лет назад
How are you gentlemen... All your MAF are belong to us....
@bcbjbggjh9102
@bcbjbggjh9102 Год назад
can u still have a bad mas sensor if u test the mas sensor by pulling the plug and the cars dies..?
@samer4977
@samer4977 7 лет назад
now i understand the maf sensor but i have one question is if the pcm give that maf sensor 5 volt to function it and the sensor it self resend voltage to the pcm by ground wire ( what the function of 12 volt wire?? ) sorry for that question but im still beginner and English is not my native language
@JohnHoganWicklow
@JohnHoganWicklow 3 года назад
What do you do if you can't back-probe, weather proof connector ?
@user-hc9ce4ue8o
@user-hc9ce4ue8o 5 месяцев назад
Very good
@TheDingmann
@TheDingmann 8 лет назад
You should never ever probe wires like that, just leaving them open to the elements and corrosion. Seals and insulators are there for a reason.
@SPLATTERHOUZE
@SPLATTERHOUZE 8 лет назад
do it like this on a daily basis for 20 years now... never had one problem.
@roadstar499
@roadstar499 5 лет назад
yes that the only way i ever see it done using pins....
@drewrinker2071
@drewrinker2071 2 года назад
Probing a wire like that does nothing more to expose it to corrosion and elements any more then it already is knuckle head. That's why on every car there is this fancy thing called a hood, to protect it from that. Should proper care be taken so you do not damage the pins on the harness? Yes, but they are actually quite reiselient. Some people will say you shouldn't probe wires because it can change the circuit and mess up the cars sensitive computer components, and while this may have been the occasional rare case with older analog type voltmeters with low internal resistance around 16k , with much newer digital multimeters having a high internal resistance of upwards of 10M ohms or some high end multimeters have near infinity internal resistance, these will have little to no effect on the functioning of the circuit.
@posticsasa4467
@posticsasa4467 9 лет назад
very good-traslation is extra
@saghirhussain4429
@saghirhussain4429 4 года назад
I have lexus is220d 2009 I was tested mass air flow sensor.I did have ignition on but engine was not runing. now I tried to stare the engine to testing the sensor again. engine doesn't over but engine was working before.
@dimitritsolakis6107
@dimitritsolakis6107 Год назад
Sounds good but how do you accelerate whilst in the hood ?
@ronaldwestcott8418
@ronaldwestcott8418 10 месяцев назад
I cannot remove my Spencer on 2007chevy ave o because the antifreeze lines are in the way so I guess I will drive until it stops
@proteusindustriesinc2637
@proteusindustriesinc2637 7 лет назад
Are those pins making any difference?
@arivuazhagan442
@arivuazhagan442 3 года назад
Thanku sir
@chrishoesing5455
@chrishoesing5455 4 года назад
Thanks for making a video, but you might have wanted to point out that this only works with MAF sensors that vary voltage on their output, where most will vary the frequency. The latter you would need an oscilloscope to get a useable reading. So, it would be difficult to know which type you have which would negate the useability of this testing method. My particular MAF sensor varied frequency, and so it just had a constant 2.8v that didn't vary with rpm. The new one was an non-varying 3.1v. Thankfully the new one did fix my problem, but the testing method didn't work in my case.
@vicky-nc3to
@vicky-nc3to 2 года назад
I think the frequency scale can work in case of latter MAF sensor
@777dannydan
@777dannydan Год назад
Did it matter that chkg the 3rd wire the demonstrator had the leads crossed?
@leticiablass7405
@leticiablass7405 2 года назад
Connecting a OBDII scanner to your car on live data will guide you to each different parts functions including the mass air flow sensor
@milindbute5259
@milindbute5259 5 лет назад
Does maf comes for petrol engines?
@ciusesnal4335
@ciusesnal4335 5 лет назад
I like it
@SerenoOunce
@SerenoOunce 2 года назад
This may tell if MAF is outright defective. But a MAF's are precision calibrated electronics so scan data is needed to determine if it's actually in spec.
@das250250
@das250250 4 года назад
One day robot voices will either be a thing or extinct
@troylollysaf9311
@troylollysaf9311 5 лет назад
I have p0113 and p0102. I replaced Maf sensor and reset code. Two days later I got the same code again. Advice Please.
@tedisuryana8178
@tedisuryana8178 4 года назад
Saya punya mersi 7 g tronic e280 th 2007 kalo dikontak van nya nyala dispeed tinggi cara mengatasinya bagaimana
@serkanfakl2850
@serkanfakl2850 2 года назад
What should be the output voltage of the air flow meter at idle
@markbristow2606
@markbristow2606 6 месяцев назад
My rpm ticks over between 800 and 1000 is this normal for a 1.9 golf tdi
@greenfarm647
@greenfarm647 5 лет назад
That is the debitmeter , the mag senzor is in other place! 🤣🤣🤣
@autotips1290
@autotips1290 3 года назад
Common man let make it Easy Turn on ur Car Takeout ur MAF sensor if ur car stop u got the Ans 😎😎😎
@steaventuangtuang9317
@steaventuangtuang9317 4 года назад
Good
@johnhefter3815
@johnhefter3815 4 дня назад
Can I replace with aftermarket maf sensor?
@alexavila2127
@alexavila2127 7 лет назад
yeah... hard to do this test when my car wont stay running with a maf connected 😬😬😬 its a new maf too
@ELdanizz
@ELdanizz 4 года назад
Thank for video..but my car mercedes w202 c200😥
@RobertSmith-rp2xy
@RobertSmith-rp2xy 2 года назад
So if its not making 12 volts does that mean it's a bad maf
@imlegend4746
@imlegend4746 2 года назад
hello...how to cheak mass air flow if engine have problem ignition missfire?
@beautyfitnesshealth4627
@beautyfitnesshealth4627 5 лет назад
my car doesnt start so how can i do the end of the test ?
@moreinfoindonesia6437
@moreinfoindonesia6437 4 года назад
How to maf sensor kia carnival 2001??
@ryanlacy554
@ryanlacy554 6 лет назад
sounds better if you watch at 1.25x or even 1.5x speed
@messer7bc
@messer7bc 9 лет назад
How do you know it works perfectly? Ok, voltage changes, but is it correct? Let's assume the MAF is dirty - it still changes voltage, but can you call this "works perfectly"? Very basic vid ...
@kiwiinaustria
@kiwiinaustria 8 лет назад
+messer7bc that you can search for yourself onlíne for the parameter's for your particular maf meter.
@DickyRedRaw
@DickyRedRaw 7 лет назад
tanx
@Devil-024
@Devil-024 3 года назад
why holding Red multimeter on the Black wire on the 3rd time ?
@BlueCollarBastard1987
@BlueCollarBastard1987 3 года назад
Do you test with car on or off?
@weeverob
@weeverob 3 года назад
what if it isn't working properly, what are the readings then?
@m.b.smoshitoa8325
@m.b.smoshitoa8325 2 года назад
This seems to be analog MAF. This trick would not work on digital one. Am I right?
@tofinoguy
@tofinoguy 4 года назад
You have a very unusual voice!
@DougieD61
@DougieD61 7 лет назад
Nice video. I am curious as to how the audio was produced. Was it a computer generated translation? Saying "earth" instead of "ground" makes me think so. The holes in my wiring harness are too tight to accommodate a nail, or even a paper clip - the ends are too blunt to get in next to the wire. I had to use sewing pins, which are kind of T-shaped. They're sturdy, yet you can bend them if you want to move them away from each other once the pin end is inserted. I imagine pulled-open safety pins would work, too, or even straight pins.
@raftonpounder6696
@raftonpounder6696 11 месяцев назад
Earth is British English. The USA uses ground.
@giantkiller8
@giantkiller8 3 года назад
My car is still hesitating during acceleration at slow speeds after replacing maf sensor n spark plugs. Pl advise
@user-kj7nm3tl3p
@user-kj7nm3tl3p 4 месяца назад
Have fuel pump tested, replace fuel filter. That's a start.
@zeyadalsheikh3839
@zeyadalsheikh3839 5 лет назад
It doesn't mean good when the voltmeter read a change when accelerating.. it must be in the range of voltage of the manufacturer to be sure the MAF works good. my MAF reads change when accelerating but not in the range of owner manual and the car still getting noise on run.
@seragali1353
@seragali1353 2 года назад
My car is Sonata 2009, American import, engine 24. It has a malfunction. When the rpm reaches 1500 revolutions, the engine shakes, whether it is moving or standing, and results in a weak engine torque.. I went to the technician more than once and he connected it to a fault detector, but to no avail without any result. .. so what is the solution?
@supunwithanage6650
@supunwithanage6650 Год назад
Gereat
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