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How to clean MAF under $10 w pics

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Old 06-03-2008, 11:24 AM   #1
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Write up: How to clean MAF under $10 w pics

I've seen a lot of people asking about how to clean the MAF, so I decide to do my own and show it to them.

Things you need during the cleaning:
CRC MAF cleaner
Torx screwderiver #15
10mm wrench


Preparation:
Park you car under a shade or a place that isn't dusty.
Disconnect the bettary using the 10mm wrench to avoid damaging the ECU.


Location:
The Mass Air Flow sensor is located on a tube between the engine filter box and the throttle filter.

Last edited by jasonmax; 06-03-2008 at 09:53 PM.
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Old 06-03-2008, 11:25 AM   #2
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Remove the MAF:
1. Clean the area around the MAF and blow away the dust on it.
2. Press the clip on the socket and pull upwards to dissconnect the MAF.

3. Unsrew to screws that hold the MAF using the Torx screwderiver #15. Pull the MAF upwards to remove from the housing. If it's difficult to pull it out, twist the MAF 90 degree, so you can pull it out with your both hands.

4. Remove the MAF carefully from the housing and make sure you don't drop it. Clean the housing and cover it with a damp towel to prevent dust getting in.

Last edited by jasonmax; 06-06-2008 at 09:35 PM.
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Old 06-03-2008, 11:25 AM   #3
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Clean the MAF:
1. A MAF has two air tunnels on it, so you have to clean both of them.
( red arrows show how air flows through the MAF)
Only 5.5th gen has this intake air temp sensor, 5th gen has seperated one.

2. Take you MAF cleaner and put the pipe on it, so you can reach small areas. When you clean the MAF, DO NOT touch anything in side the tunnel with the pipe because that can damage the sensor.

3. Keep blowing the cleaner for 2-3 seconds to each tunnel, and you can also clean the resistor at the same time. After cleaning the MAF, let it sit for 15 minutes to dry. I prefer to put it like this, so dust won't get in.


Reinstall:
When you put the MAF back, just make sure the air flow direction is correct, with two tunnels/holes facing to the air filter.


Relearn procedure:
After putting the MAF back to the car, perform the ECU reset and Idle relearn procedures.

Last edited by jasonmax; 01-16-2010 at 07:31 PM.
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Old 06-03-2008, 11:26 AM   #4
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I have yet to see maf cleaner work on the 5.5 gen maf. But on other vehicles it works great.
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Old 06-03-2008, 11:54 AM   #5
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So... any thoughts after it was cleaned? Because I sprayed mine with the CRC too and did nothing. Perhaps mine is already gone... but I ordered a new one and JUST received it via FedEx from DaveB as I'm typing this reply lol. Imma install it @ lunch! w00t w00t! Fingers crossed! Hopefully no more 15-17mpg!
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Old 06-03-2008, 11:55 AM   #6
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i wouldnt recommend doing this in your bathroom dont u need a well ventilated area when usin the cleaner j/k with ya nice lil write up. any difference after the clean up?
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Old 06-03-2008, 12:18 PM   #7
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I get a greater gm / s reading after I clean mine.
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Old 06-03-2008, 12:28 PM   #8
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Any increase in MPG??
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Old 06-03-2008, 12:47 PM   #9
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So... any thoughts after it was cleaned? Because I sprayed mine with the CRC too and did nothing. Perhaps mine is already gone... but I ordered a new one and JUST received it via FedEx from DaveB as I'm typing this reply lol. Imma install it @ lunch! w00t w00t! Fingers crossed! Hopefully no more 15-17mpg!
thorttle responses better and rev harder. idle is smoother then before.
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Old 06-03-2008, 12:48 PM   #10
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Any increase in MPG??
I'd say 1-2mpg higher
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Old 06-03-2008, 02:08 PM   #11
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I just install my new MAF and maxi is pulling like a champ! I guess I had a bad MAF the whole time with no codes. Moral of story is... it doesn't matter how you clean it or what you clean it with... when it craps out, it's just out, period! <--- That's the case for me at least. Time to see what MPG I gonna get!

But anyways! Mad props for the step by step with color pix!
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Old 06-03-2008, 03:30 PM   #12
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Quote:
Originally Posted by sciff5 View Post
I have yet to see maf cleaner work on the 5.5 gen maf. But on other vehicles it works great.
Worked fine on mine. After installing a K&N panel filter, I noticed a slight bog on light to moderate acceleration around 2500 rpm. Pulled out my MAF, sprayed it down with CRC, let it dry, reinstalled it and no more bog.

Didn't reset the ECU or do an idle relearn either. Cleaning the MAF didn't seem to affect anything other than getting rid of the bog.

--------------------

You don't have to worry too much about how you reinstall the MAF, it only bolts up with it in the correct position.
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Old 06-03-2008, 05:20 PM   #13
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Hey! Great write-up op! You made the process so easy I immediately ran to my car and brought my MAF inside to clean...however, to my surprise I noticed that my MAF was slightly different than yours...there is no resistor as yours has shown in the picture! I was wondering if you could tell me the value that yours is reading across that resistor? If anyone knows the value of the resistor that is on the MAF please let me know I would like to put a replacement in before I order a new MAF....might as well try! Thanks
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Old 06-03-2008, 05:27 PM   #14
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Or is this a Thermistor of some type??? Is it replaceable? The help is much appreciated

EDIT: This is the thread that I read about a Thermistor that is the main difference between 2k2 and 00 MAFs...I have an 00 is this the reason there is no "therm/resistor in that spot?

http://forums.maxima.org/showthread....+for+2k2's

Last edited by Nakulbhatt87; 06-03-2008 at 05:30 PM.
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Old 06-03-2008, 06:41 PM   #15
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Jason: Did this cure your throttle lag problem you posted in another thread?

BTW:Good write up and excellent pics.
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Old 06-03-2008, 06:51 PM   #16
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Awesome write up. I'm going to clean my MAF tomorrow.
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Old 06-03-2008, 08:56 PM   #17
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Jason: Did this cure your throttle lag problem you posted in another thread?

BTW:Good write up and excellent pics.
it does cure the throttle lag a little, but not very much, I think my MAF is about to die or somehow.
but this is a good write up for those who want to clean their MAF.
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Old 06-03-2008, 08:58 PM   #18
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Hey! Great write-up op! You made the process so easy I immediately ran to my car and brought my MAF inside to clean...however, to my surprise I noticed that my MAF was slightly different than yours...there is no resistor as yours has shown in the picture! I was wondering if you could tell me the value that yours is reading across that resistor? If anyone knows the value of the resistor that is on the MAF please let me know I would like to put a replacement in before I order a new MAF....might as well try! Thanks
what is your car?
I think the Nissan X-Trail uses the same MAF because I used to drive that car, and I had the MAF replaced.
I don't know if the QR25DEs use the same MAF as ours, but the X-Trail was QR25DE.
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Old 06-04-2008, 06:07 AM   #19
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It's been established, 00-01's do not have the thermistor, 02-03's do.
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Old 06-04-2008, 10:44 AM   #20
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i cleaned my 02 MAF and noticed a slight improvement

thank you for the good pics
must threads like this have blurry pics because people dont know how to use the macro
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Old 06-04-2008, 11:23 AM   #21
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I actually cleaned my 01 AE's MAF today. Doesn't bog at 3500 rpm anymore.
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Old 06-05-2008, 12:45 PM   #22
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Maybe I'll take mine out and take a look at, I'm sure it could use a cleaning.
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Old 06-05-2008, 01:19 PM   #23
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It's a little hard to tell if it''s dirty by looking at it. Just use this write-up, it couldn't hurt.
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Old 06-05-2008, 04:39 PM   #24
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Excellent.

Is the CRC product the only one to use, or are there others worth using?
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Old 06-05-2008, 06:10 PM   #25
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I've got a 2000 I30. I am thinking that it's just a thermistor as stated in http://forums.maxima.org/showthread.php?t=258878&highlight=2k1+MAF+upgrade+ for+2k2's....the pictures don't work on this page so I couldn't be exactly sure from the pictures. Thanks for the help everyone, and sorry for the pestering I just want to be absolutely sure. Thanks
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Old 06-05-2008, 10:10 PM   #26
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coming from someone who in no way claims to be mechanically suave, would you recommend for me to do this? i just don't want to mess anything up... I drive a 2000 Max and it has roughly 133k miles.

and I have noticed that I do bog around 3500rpm

Last edited by Bradbmx1; 06-05-2008 at 10:12 PM.
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Old 06-05-2008, 11:55 PM   #27
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great write up! I'll take a look at both of my maximas. I'll see if there is a difference after cleaning!
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Old 06-06-2008, 12:57 AM   #28
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Good write-up. I need to do this to my MAF.
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Old 06-06-2008, 04:49 AM   #29
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Great writeup, good pictures!

I cleaned it last night and this morning felt better response, nice! Did not reset ecu or idle relearn procedures.

I wonder how frequently this can be done?
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Old 06-06-2008, 06:16 AM   #30
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Great writeup, good pictures!

I cleaned it last night and this morning felt better response, nice! Did not reset ecu or idle relearn procedures.

I wonder how frequently this can be done?
I do mine every time I clean my K&N.
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Old 06-06-2008, 06:18 AM   #31
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cleaned the MAF last night while we installed an RSB on my buddies accord
took 20 minutes all together and most of that was waiting for it to dry
DEF feel a difference
no more hesitation from a stop, and more consistent power curve. I dont feel as many jumps in power, now its a smooth acceleration
thanks for the write up, ive wanted to do it but was tooooooooooooo lazy to get off my *** and do it until this write up
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Old 06-06-2008, 06:36 AM   #32
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cleaned the MAF last night while we installed an RSB on my buddies accord
took 20 minutes all together and most of that was waiting for it to dry
That stuff dries in seconds, more like evaporates.
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Old 06-06-2008, 07:00 AM   #33
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not in south florida where the humidity is 100% 24/7/365
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Old 06-06-2008, 07:00 AM   #34
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I'm lucky to exceed 12% here.
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Old 06-06-2008, 10:53 PM   #35
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i did it... and wow, I noticed a vast difference in response. It also got rid of the check engine light :P
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Old 06-07-2008, 08:57 AM   #36
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That stuff dries in seconds, more like evaporates.
but still needs to dry, not to dry the cleaner, but the moisture that happens when cleaner vaporises.
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Old 06-07-2008, 08:58 AM   #37
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Great writeup, good pictures!

I cleaned it last night and this morning felt better response, nice! Did not reset ecu or idle relearn procedures.

I wonder how frequently this can be done?
it's easy to do, so I think I'll do it every other oil change.

Last edited by jasonmax; 06-07-2008 at 09:00 AM.
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Old 06-07-2008, 09:02 AM   #38
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Excellent.

Is the CRC product the only one to use, or are there others worth using?
it's the CRC maf cleaner the only one to use if you don't want to mess up the sensor.
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Old 06-07-2008, 09:20 AM   #39
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but still needs to dry, not to dry the cleaner, but the moisture that happens when cleaner vaporises.
Evaporate?
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Old 06-07-2008, 08:34 PM   #40
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nice write up, adding this to the list of junk to do
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