Scanning MAF or Mass Air Flow Sensors

[PatriotRadioMilitia]

i removed the neck on the intake box to get more air but it seems the censor sees all the extra air and now it run rich

[AeroPR]

Thanks. Great vids. Would be great to have an actual person speaking. it gets really anoying

[smithraymond09029]

I got your "hot wire".

[AdamKays]

is this robot voice?

[ADPTraining]

@AdamKays Yes... I invite to check "Stories from the Road" our new series... Thanks for posting...

[AdamKays]

@ADPTraining Thats pretty cool man, the robot voice still gets me but those vids are pretty good in my book

[foxdmulder]

poor quality air filters can effect maf hot wire type sensors.

filter paper/materials enter the maf and can become lodged on the wire, best way to remove them is with a cotton bud.

be gentle and light with them, dont use sprays, they contaminate the wire.

[ADPTraining]

@foxdmulder A good tip is to use a special electronic cleaner sold at Radio Shack, which has a built-in fine bristle brush at the top. For some reason this cleaning fluid is the best for MAF element cleaning. Good post from foxdmulder, I agree with all of it. Good luck to all.

[Bushougoma]

@foxdmulder CRC makes a specialty spray especially for cleaning MAF sensors it leaves zero residue. It's much safer than wiping with a piece of cotton which will leave strands of cotton fiber behind which IS a contaminant.

[gstak07]

@Bushougoma CRC works and they recommend you to clean your maf every time after you clean or change your air filter

[ADPTraining]

@gstak07 That's a great idea since most air filters do leave behind a fiber particles. Thanks for posting...

[ADPTraining]

Beware of these magic fluids. They almost always make the problem worse. Hard shifting points to a possible PC solenoid. Post back with more.....

[Jonnyferrari202]

My 2000 Saturn LS2 (3.0 V6) has been well maintained, the MAF replaced, ignition coils, transmission solenoid and lots of other preventative and regular maintenance done, including transmission flushes. I purchased the car used, along with much of the maintenance records. Yesterday, I noticed that when shifting, it seems to have the slightest hesitation when shifting, and a barely noticeable lurch or jerk occurs when it shifts. has 89k last flush done at 75k, would no-slip trans fluid help it?

[markweatherill]

I wonder if you can diagnose this problem please:

My 2000 Toyota Yaris-based car will always start from cold, but when the engine is hot, it will almost never start first try, however if I turn the key back and try again, it will almost always start. Could that be the MAF? Could 'heat soak' do this?

[KASHMIRI7864LYFE]

mass air flow will this problem make the car stall while taking corners? pls help

[spedee33]

bvj

[adrianchic13]

i have a 1996 nissan maxima, and it has the weirdest problem when starting it. when the car is cold and you try to start it, it takes a couple of tries, and you have to pump gas, and after 2 or 3 tries it starts, but when its been ran for a while, and its warm, and turn it off, it turns on normal., why is this?

[ADPTraining]

@adrianchic13 OK, good description. This sounds like a fuel pump prime-pressure problem. In other words, the FP rail and lines loose the pressure over time. Normally the FP should pressurize the fuel rails within 2 seconds, but you may also have a clogged fuel filter or a weak fuel pump. To test this theory: in the morning spray some carburator cleaner into the air intake. The CC is combustible and will make the engine start right away. If so then you have a fuel issue. Good luck.

[freemunny]

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[suikoayanajim2]

Anyone Please Help...

Where can i buy online a Mass Air Flow Sensor and a Distributor for my 13B RX7 1994 :(

[josesanchez717]

gracias por poner este tipos de video les agradeceria ponerlos en castellano o trdicirlos truducirlthanks for putting this video types would appreciate them in Castilian or truducirlos is very good and informative thanksos esta muy bueno e instructivo gracias

[arnoni11]

i got a cold air intake on a 1996 camaro v6 3.8L my first maf was bad it stalled out or had a rough idle would move on its own so i bought a cardone maf and it just stalled it its unpluged now it works fine but i dont know what todo

[ADPTraining]

@arnoni11 Please, post your exact condition and complaint with further details. Thanks.

[orcguanaco]

thanks for the video it was really helpfull !!

[DMM9786]

i have a 96 tahoe and changed the mass air sensor because the truck kept shutting off at start up and code was for maf. after i installed new maf it ran great for about 45min then went back to shutting off and rough idle . i went online and someone said to check egn1 fuse> it was blown then i replaced it> it last for 30min then blew again it keeps blowing that fuse what do i do??? any ideas?? thank you!!

[ADPTraining]

@DMM9786 YES, YES, there's a 99% chance that this fuse is shared with something else. Find out from the wiring diagram, what is shared with this fuse. Also, disconnect the MAF and see if the fuse pops. Good luck...

[engine4life]

I hope you can help me with my rb25det nissan engine.when i drive i can only use 50% trottle to be able to get to redline without the engine hesitating. If i give 100% then i get hesitation and huge misfire at around 4000rpm onwards. the rpm is steady on idle then sometimes the engine dies out sudden, the engine sound is normal. ive changed fuel pump, spark plugs. Im wondering if my maf is bad or my coil pack? too much air? i have a apexi filter and straight exhaust.

[NewWorldCorp]

my MK3 golf has a high input CODE message does this mean that i could just trace ground and repair the MAF?

[ADPTraining]

@NewWorldCorp I need more info. What is the DTC (code) number. Most of your diagnostic will be done through the scan tool first, especially using the fuel trim PIC (parameters). See our Fuel-Trim PID video. Get back to us with more data. Good luck...

[thebosse5]

what does it mean when you rev the engine and the rpm slowly falls instead of just droping down into where it should idle

\

[engine4life]

@thebosse5 does your engine sound like its pulsating when rpm falls? then i would try adjusting the timing

[KatlynNelson20]

uhmirgend jemand lust und laune af bissl cam chat mir ist so öde :(

[noni606]

I recently change my toyota celica 2003 head gasket and the mil light turned on after I ran a few miles. The code indicate misfire of all cylinders. The only trouble I have with the car is that on park and on N the rpm of the car goes from 700 to 1500. And it takes longer than usual to warm up. Do you have any idea what can it be. thanks

[ADPTraining]

@noni606 I need more information. What was the DTC for the misfire? When you say engine races from 700 to 1500RPM, how does it happen? The more input the better. Also need engine size. Thanks...

[noni606]

It says code p0300 p0301 ,02,03,04 and when it changes rpm it goes up an the down an then up. engine is 1.8 1zz. the car doesnt give any problem when im on the road but when i stop the rpm goes crazy down and up. thanks

[ADPTraining]

@noni606 OK, the up-down symptom is 95% related to a faulty throttle-switch. The TS may be part of the TPS. Your engine is surging like that due to injector-cut off, because of the TS. The TS says open throttle, but TPS/MAP or MAF says closed throttle, so ECM cuts injector pulse momentarily. Check your throttle switch.

[ADPTraining]

@ADPTraining As for the misfire codes, there are two possibilities: Check your crank sensor. Domestic models were known for overly sensitive crank sensor signals, so an ECM reflash was used in the past. But NEVER seen it on Toyos. Most likely cause are valves not seating properly. Very common on Toyos after a head job. Hope not. With misfire DTCs, ECM may reduce performance at times. So plan for it. Good luck...Mandy.

[noni606]

@ADPTraining  thanks a lot really help me out because i had the car 2 weeks in the mechanic and he dindt find the problem but today i clean the idle speed control valve in the throttle and the car is working fine. thanks again

[AntDX316]

I had blocked the MAF with the tornado fuel saver on the 545u BMW and it was really bad when accelerating from a stop so I put it behind and it drives better than ever.

[ADPTraining]

Yeah, good for you. FYI the principle behind that fuel-saver is swirl. Having that, most newer vehicles (1999-up) have what's called variable geometry intake manifold, also employing a deviation valve/solenoid. The idea is to change the length of air travel to create air swirl. A turbulent air swirl improves air-fuel mixture and fuel economy. Hence the name "Tornado".

[ADPTraining]

Cont...

Those after market fuel savers should be placed after the MAF sensor. If your vehicle already has a variable geometry intake, then it's really not necessary.

[AntDX316]

@ADPTraining So it shows that it works, and works to the point of causing the MAF to malfunction due to it's effectiveness in changing the air flow.

[ADPTraining]

Yes, if you like its benefits then good job. The idea is to swirl the air flow as much as possible. But if in front of the MAF, the sensing device is skewed by the increased turbulence....

[N3st3AA]

sorry missed spelled.

speed density has MAP and BARO and no "MAF"?

[ADPTraining]

Yes and no, it used to be that MAP (SD) systems had no MAF sensors. That's not true anymore. On many 99 and up systems, the MAF is complimented by a MAP sensor for two reasons.

1) As an EGR valve opening detector and to diagnose the EGR system. There is a drop in vacuum whenever the EGR valve opens. This drop and severity of it is measured and used by the ECM to issue DTCs and calculate EGR PIDs (scanner parameters).

[ADPTraining]

1) The MAP sensor is also used as a redundant sensor. In other words, in case the MAF fails.

MAF sensors are more accurate than MAPs, albeit, also more problematic. So if a system has a MAF sensor, it is always used as a primary incoming air measuring device. Anyone that has a MAF and MAP combined system, if you suspect a faulty MAF sensor, disconnected and within two to three startups, the vehicle should run fine. It's running on the MAP backup.

[ADPTraining]

Continued:

Furthermore, the main difference in MAP systems is that the ECM uses a look-up table and does all measurements in a calculated fashion; as opposed to the direct and more accurate way with the MAF sensor. That's truly the main difference between the two. Good luck to all...Mandy.

[N3st3AA]

these videos a fantastic and help alot. i just have a question if you could answer.

when a topic of a "speed density" type fuel injection vehicle is being discussed opposed to a vehicle with MAF is the only difference that the "speed density" vehicle has a MAP and BARO sensor and no MAP?. im confused on the concept if im not clear say so and ill re-word.

thankyou very much

[USGiorgi]

if there is any deposits on the hotwire, you better check your air filter or you are going to be in BIG trouble. The wire is very small so for some debris to hit it, means that there is a lot more junk going directly into the engine.

[ADPTraining]

Right on, this problem is a direct result of low cost air filters used during tune-ups. It is also caused by exceedingly dirty driving environment, which is not the driver's fault.

A third cause is back firing engine or excessive oil consumption. Once the engine is turned OFF the oil mist accumulates on the hot-wire element and grows hairs, as it is called in the industry.

[serchmarc]

this sensor is for air mass ,why the computer said AIR FLOW too?dont work with the flow but oviously it detect it but not lika a AIRE FLOW METER

[ADPTraining]

Hello, in the past air mass meters had a mechanical flap linked to a potentiometer. In today's systems air flow or air mass is used interchangeably. The air mass is inferred through an ECM calculated formula, according to the current needed to maintain a steady temperature at the hot filament (platinum wire). Thank you.

[serchmarc]

@ADPTraining uhmm when i see a big box is aAIRFLOWMETER cause has a big plate that moves with the air induced by the suction engine flow and with the help of the potentiometer vary the resistance and etc but if the engine has a little tube has a hot filament ,i didnt know there was engines that have both just air temp sensor with AFM..OFcourse if the engine has a AIR MASS sensor(hotfilament) the ECU can calculate the FLOW with calculations but doesnt have the plate,thats whyim confused

[changling21]

speed densisty EFI systems use this sensor to calculate engine load and airflow.

[tipaction]

help me please. i bought a 2002 mondeo ghia x. The guy i boughtit of said its lacking power because the air flow meter is of it. I get about 6 miles with it then it dies on me as if its ran out of deisel. Is this the problem or could it be something else. It also smokes when its about to stop but its deisel smoke not oil.

[ethybaby03]

ive had a constant problem with the power in my mondeo, it should be a better performance than what it is and after doing a little homework and looking at the engine i relised that mine doesnt have the air flow meter on it either. its cut out a few times but i have never seen any type of smoke from any part of the car.

[plimbuff]

Judging from your love of Elton Jon, I think It's safe to say you are a "Gay Racist".

That's a hilarious combination haha ...a "Gay Racist" hahaha ...I admit I'm easily amused

[jawnniedarko]

elton johns the man

[plimbuff]

Sure.

I guess he kicks ass.

[Jasonschutze]

thats what i was going to say

[grovermdsl]

no hay cosa mas noble que ensenar sin mesquindad gracias por el video.

[ZeoGox]

totalmente de acuerdo contigo ;)