MAF Test part 1

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[@spelunkerd]

@michaelovitch I've got a single mic and when I replay and post, I get sound out of both speakers, which is not a problem. But for this video, wearing headsets means you only hear sound out of one ear. Can you offer any suggestion as to how Duane can get sound out of both sides? One of the clips in this video had the sound reversed to the opposite speaker, and he's posted some clips that are fine. Is this a processing problem, or is it a poor connection at the mic jack?

[@hddm3]

wow, this guy is smart. wish there we more mechanics like him. What we all could learn in a month from this guy.

[@jaimecarbone6580]

This is a great Professor, so smooth and well paced trainer, cheers!

[@rfn944]

This is the best explaination of MAF theory of operation I have heard. Thanks, great presentation.

[@kengingras549]

Great information shared. I really enjoy watching the videos.

[@dejohnny2]

Thanks for making this video. I have a better understanding of how a MAF works.

[@Hurlburton]

I can't ask any questions. Everything was completely covered in a excellent manner. Better than going to school and that's the truth.

[@Hurlburton]

Duane you have to be the best star of a youtube auto video out there.

[@joses5301]

first of all, I want congratulate. You, for share. Your. Good. And valuables repair videos and also for very detailing. Expansion

[@joses5301]

Very. Detailing. Explanesion. And. Your. Well and clear speech, thank you so. Much,

[@michaelovitch]

@michaelovitch if you use your heaphones you can hear sound on the left side too but just a bit. it looks like a balance problem only.

[@tylerw3st]

You are correct as well, however current is measured in amperes.

[@edikwilson9705]

Great presentation, you definitely know your stuff well done. Extremely helpful

[@Hurlburton]

What a class. It's good I had to look at it quite a few times. After all If it was easy yhere wouldn't be any money to make. what I'v so far is really good.

[@michaelovitch]

@spelunkerd it's not a problem it's a monophonic microphone.

[@canadatransistor]

2min30sec. frequency can be explained by on off time (duty cycle) - that's not a correct statement. that's pulse width modulation. Frequency is defined by cycles per second in hertz. You said this MAF varies the frequency. Just putting that out there.

[@jojomama4787]

wow,very elegant way of explaining this.. I'm dealing with this tomorrow so this information comes at the perfect time,THANKS SO MUCH!!!

[@neilsuarez3618]

very good day my friend, I need a BCM program the Chevrolet Cruze, I have the MDI, TIS2Web and SPS. do you know the replacement procedure.'?

[@dcanon]

Great info. Always well explained.

[@mrwebber35]

The MAF on my 3.8L OLDS almost caused a car accident. It caused my unsuspecting wife to almost hit a car in front of her but she had the mind set to turn onto curb. It did set a code error after that incident. The MAF called for an increase in fuel when the engine stumbled and almost died at idle. To be more exact the low RPM of almost stalling (because of a bad MAF) made the computer open up the injectors which over compensated for the low air flow. If the brake is not being applied at the time the engine surges for only a second but that is enough to send the car suddenly forward and could be catastrophic if in close proximity to something or someone. Readings using the OBD II scan tool before the error was picked up showed MAF g/s at 5.73 with RPM at 846 RPM. After error code P0102 it showed MAF g/s at 1.75 at 2171 RPM. With new MAF replacement it showed MAF g/s @ 18.77 at 1432 RPM. Tapping on the MAF did nothing for causing engine stumble. You can see that the new MAF has much higher airflow at a lower RPM, which you can use to check your MAF. I don’t want anyone else to experience what my wife did.

[@EarlGuyton425]

mrwebber35 I had the same thing happen on my 02 ford truck. It would idle up and down and when you accelerated did nothing and then would lunge forward at full throttle. Had I been in traffic this could have caused a major accident. I watched YT videos and can say many of these certified techs are WRONG. Where several certifieds say if you unplug the maf your system with use its backup and you can use this as a test means. NOT ON ALL OF THEM!!! My vehicles engine as I described above was just as violent with it unplugged as with it plugged in, so maybe some have no backup memory because my PCM is working right. Next morning I went to Oreilleys parts in my dodge ram and bought the MAF for the 02 ford and after installing it the problem is gone. So where these techs say they you can unplug a maf and it will run right is not true in all cases. The best way to describe what my engine did is a strong man that has a seizure and three people have to hold him down. If a petite woman would have been driving the thing it could have gotten them killed. Its LOL not funny but when your car turns on you and get rabied LMAS. I'm a master mechanic too so I'm not exaggerating here

[@mrwebber35]

Earl Guyton What's amazing is that There is no difference between Toyota ford Honda Chrysler GM Or Volkswagen when it comes to these things. I just bought a 2015 GM I'm curious to see how that's designed.

[@mrexecutive1]

Welcome back, we missed you there for awhile!

[@66crush9]

My PCM definitely looks for Rock N Roll not country , great analogies and video!

[@WimWoittiez]

I loved your video on the vacuum test: very clearly visible, concrete example, brilliant. With this one, I have to remark that you're confusing the electrical notions of frequency modulation and pulse width modulation. Also current and electrical power. For didactic purposes, it's probably better to use a MAF with a simple proportional voltage output. The frequency really doesn't have anything to do with basic operation. That's simply an extra conversion done for better signal transmission.

[@estrelladelnorte1308]

nice videos!! i really apreciate what you do Sr.!!!

[@carlodonnell146]

I know that it is possible to clean the hot wire MAF but what about the one with the film, can the film be cleaned or does it have to be replaced. I don't hear much about the film type MAF.

[@realfixesrealfast]

Carl, as long as there is no current passing thru it, yes it can be carefully cleaned, I have had success doing it

[@carlodonnell146]

@@realfixesrealfast thank you for clarifying that.

[@blazingtonight1]

So your saying that if I'm testing a maf...I should check it in hurtz and watch for a drop of current or a raise of current and also determine how long its applying the current to determine if the pcm is working and if so I should check the mag..to servitude it a has any resistants

[@spelunkerd]

Audio only out the right speaker, similar problem with your videos last year. Thanks for posting, Duane. I always look forward to videos made by you guys.

[@PIANOSTYLE100]

Can you recommend a good book..I don't care if it's a download

[@michaelovitch]

@michaelovitch it's certainly a mix/editing sound bad configuration because during the recording the sound is on an auxiliary input and certainly recognized like "auxiliary" by the editing software.

[@michaelovitch]

@kevinf1990 because he has a mike and it's a monophonic one.

[@kevinf1990]

nice video!! but just wondering why is audio only coming out of the right speaker?

[@03grandgtramair]

have you checked all the vacume lines? also M.A.P sensor

[@tragichero7746]

how you explained this made it very easy to understand. Thanks As always Duane

[@PIANOSTYLE100]

Feel like I'm back in electronic school..

[@cower16]

knowledge is power!

[@305chevyboysp6]

i have chevy impala 03 what cause the rpm gauge to jump

[@Evrenthewrencher]

Hello I have a rare Reading of mad sensor 4,3 v at idle and it goes down smoothly at rpm like 4.3 4.2

[@hafizmahmood5673]

awesome descriptions and way of making the theory understandable!

[@hunkydude322]

good job as always in your interpretation of the theries etc... lots of these folks that comment , they sound like abbott and costell, saying, whos on first., But anyways sir continue on your good work.

[@TheTarrMan]

Looking forward too part two.

[@michaelovitch]

@spelunkerd i've got a stereo system and stereo headphone too and i hear only the mike sounds (his voice) of this vid on the right side. the others sounds in the vid are both sides. that's mean his sound input is monophonic or the editing distribute the mike sound monophonic. It's to him to choose during the editing to distribute on the two channels. the poor mike connection is not a bad idea but doesn't seem to be the cause if like you wrote the sound is reversed in others vids.

[@andersonrowland]

Great video!

[@fordnut4914]

I thought Clint Eastwood was going to ride up his horse at first and ask you to diagnose his horse.

[@ip161314]

nice!!!!!! what about t-map sensor based cars?

[@AlxN52]

Great channel. What happen to him he’s no longer active?

[@realfixesrealfast]

I'm still active, just been busy and haven't posted lately

[@AlxN52]

realfixesrealfast ok 👍🏼 good to hear back from you im a fellow technician learning the ropes. I hope you post new videos when you get the chance.

[@INTERNA9]

THANX

[@moofushu]

That's the song i hear in my head whenever I've disappointed my wife. The door swings open and that's what i hear when i look at her eyes.

[@mickblock]

So if I can't pick up country music on my radio then I should have my MAF sensor tested? Wait what?

[@abdulrincon7001]

Where can I get address

[@phillipfleming1214]

gday ;) good bad and ugly realy god movie , but ur vids very helpful both u and clint and van cliff legends

[@bobdennis9171]

who knows why wires would burn and short on maf

[@carlthornton3076]

Very Good!... #65 ✝ {9-26-2022}

[@צביקהטורגמן]

איך היית מתקין hho cell ומתגבר על חיישני הרכב.

[@carlodonnell146]

I don't mind either country or easy listening, but I'm not a PCM HA HA!!!!

[@RossBoss90]

what a Coincidence got a 04 blazer with this engine code lol. Chevy fail

[@bhstone1]

@kevinf1990 same problem here on my mac

[@ebayerr]

What happened to the sound?

[@ugd240000]

MIND OPINING THANKS FOR EXPLAINING IT :)

[@hp11208]

I didn't see Gringo lo.