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06-03-2008, 11:24 AM
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#1
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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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.
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Last edited by jasonmax; 06-03-2008 at 09:53 PM..
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06-03-2008, 11:25 AM
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#2
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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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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06-03-2008, 11:25 AM
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#3
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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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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06-03-2008, 11:26 AM
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#4
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Supporting Maxima.org Member
 
Join Date: Feb 2002
Location: Mass
Posts: 2,563
Points: 14,100, Level: 77 |
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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.
__________________
2002 Infiniti I35 Sport Package
Progress RSB, Otto FSTB, Michellin Pilot Sports A/S, Eibach Springs, Illumina Shocks, Fx35 Brakes Rotors/Calipers, Custom SFCs
1989 Mazda Rx7 GTU
Ls1/T56 W/ Ported TB and Full Exhaust
11.67 at 120mph 3rd time out
My Car Domain Page
http://www.cardomain.com/ride/2340299
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06-03-2008, 11:54 AM
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#5
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Senior Member
Join Date: Apr 2007
Location: SoCal
Posts: 2,407
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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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06-03-2008, 11:55 AM
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#6
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Member
Join Date: Dec 2007
Location: dallas tx
Posts: 159
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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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06-03-2008, 12:18 PM
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#7
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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I get a greater gm / s reading after I clean mine.  |
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06-03-2008, 12:28 PM
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#8
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Mauja He Mauja
Join Date: Oct 2001
Location: Indianapolis, IN
Posts: 5,214
Points: 15,321, Level: 79 |
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Any increase in MPG??
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06-03-2008, 12:47 PM
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#9
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by IHAVEA2KMAXIMA
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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thorttle responses better and rev harder. idle is smoother then before. |
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06-03-2008, 12:48 PM
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#10
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by ZIPPIN
Any increase in MPG??
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I'd say 1-2mpg higher |
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06-03-2008, 02:08 PM
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#11
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Senior Member
Join Date: Apr 2007
Location: SoCal
Posts: 2,407
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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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06-03-2008, 03:30 PM
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#12
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That's Mr. Detail to you
Join Date: Nov 2007
Location: Arlington, TX
Posts: 3,939
Points: 11,878, Level: 71 |
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Quote:
Originally Posted by sciff5
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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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.
__________________
2004 Honda Accord EX V6 5AT, debadged, intake resonator removed, mid-muffler delete, tinted windows, RSX wheels
2002 Maxima SE 6 speed, K&N panel filter, GAB-more gears, more fun! Now no more, RIP 9/01/11
2002 Maxima SE, NWP block plate, GAB, Warpspeed test pipe, Vibrant FSTB, grounding kit, smoked tails. RIP 1/16/2011 due to a pile of garbage drunk driver
How to wash your car with Optimum No Rinse: http://www.youtube.com/watch?v=mYOAyxsEIuQ
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06-03-2008, 05:20 PM
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#13
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Member
Join Date: Mar 2005
Posts: 197
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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
__________________
Gone but not forgotten - My Maxima Story:
1996 I30 Base Gold spoiler - Sold
1994 Nissan Maxima SE Grey - Sold
2000 I30 Base Black- Crash (3/2008)
Current:
2000 I30t (Black) - 189k - Acq'd 7/2010 - Tints, Full t-package (VLSD, Side Skirts, Spoiler, HIDs, 5-spoke t-wheels), I35 Grill and LED tails and exterior lamps. The Beauty.
1998 Maxima SE (Black) - 135k - Tints, Lowered, Exhaust, K&N, STS, Weighted Knob, Strut Bar, Bose w/Basslink, too much to list not enough to hype. The Beast.
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06-03-2008, 05:27 PM
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#14
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Member
Join Date: Mar 2005
Posts: 197
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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?
Upgrading to stronger 2k1 MAF?
__________________
Gone but not forgotten - My Maxima Story:
1996 I30 Base Gold spoiler - Sold
1994 Nissan Maxima SE Grey - Sold
2000 I30 Base Black- Crash (3/2008)
Current:
2000 I30t (Black) - 189k - Acq'd 7/2010 - Tints, Full t-package (VLSD, Side Skirts, Spoiler, HIDs, 5-spoke t-wheels), I35 Grill and LED tails and exterior lamps. The Beauty.
1998 Maxima SE (Black) - 135k - Tints, Lowered, Exhaust, K&N, STS, Weighted Knob, Strut Bar, Bose w/Basslink, too much to list not enough to hype. The Beast.
Last edited by Nakulbhatt87; 06-03-2008 at 05:30 PM..
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06-03-2008, 06:41 PM
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#15
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Supporting Maxima.org Member
Join Date: Nov 2004
Location: Ottawa, Canada
Posts: 434
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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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06-03-2008, 06:51 PM
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#16
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Member
Join Date: Mar 2005
Posts: 99
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Awesome write up. I'm going to clean my MAF tomorrow.
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06-03-2008, 08:56 PM
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#17
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by jkayca
Jason: Did this cure your throttle lag problem you posted in another thread?
BTW:Good write up and excellent pics.
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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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06-03-2008, 08:58 PM
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#18
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by Nakulbhatt87
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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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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06-04-2008, 06:07 AM
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#19
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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It's been established, 00-01's do not have the thermistor, 02-03's do.
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06-04-2008, 10:44 AM
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#20
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Cletus
Join Date: Sep 2003
Location: OKC, OK
Posts: 23,461
Points: 23,108, Level: 93 |
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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
__________________
Represented by: Graham Motorsports Media
2008 Xterra Off Road (N50 | VQ40DE | KH3)
A few offroad mods
Maxima - sold (but my 5th gen knowledge wasn't in the trunk when I sold it)
O2 Sensor Locations and Corresponding Codes
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06-04-2008, 11:23 AM
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#21
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Senior Member
Join Date: May 2008
Posts: 8,370
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I actually cleaned my 01 AE's MAF today. Doesn't bog at 3500 rpm anymore.
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06-05-2008, 12:45 PM
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#22
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Senior Member
Join Date: May 2008
Location: Chicago, IL
Posts: 1,738
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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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06-05-2008, 01:19 PM
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#23
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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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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06-05-2008, 04:39 PM
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#24
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Member
Join Date: Jun 2006
Location: OC, CA
Posts: 56
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Excellent.
Is the CRC product the only one to use, or are there others worth using?
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06-05-2008, 06:10 PM
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#25
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Member
Join Date: Mar 2005
Posts: 197
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I've got a 2000 I30. I am thinking that it's just a thermistor as stated in Upgrading to stronger 2k1 MAF?....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
__________________
Gone but not forgotten - My Maxima Story:
1996 I30 Base Gold spoiler - Sold
1994 Nissan Maxima SE Grey - Sold
2000 I30 Base Black- Crash (3/2008)
Current:
2000 I30t (Black) - 189k - Acq'd 7/2010 - Tints, Full t-package (VLSD, Side Skirts, Spoiler, HIDs, 5-spoke t-wheels), I35 Grill and LED tails and exterior lamps. The Beauty.
1998 Maxima SE (Black) - 135k - Tints, Lowered, Exhaust, K&N, STS, Weighted Knob, Strut Bar, Bose w/Basslink, too much to list not enough to hype. The Beast.
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06-05-2008, 10:10 PM
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#26
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Member
Join Date: May 2008
Location: Shelbyville, TN
Posts: 32
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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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06-05-2008, 11:55 PM
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#27
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Senior Member
Join Date: Oct 2007
Location: Houston, Tx
Posts: 6,941
Points: 14,349, Level: 77 |
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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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06-06-2008, 12:57 AM
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#28
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I R The Law
Join Date: Apr 2004
Location: Sacramento, CA
Posts: 10,040
Points: 14,733, Level: 78 |
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Good write-up. I need to do this to my MAF.
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Progress Coilovers, Otto racing FTSB, Stillen RSTB, Progress RSB, Window tint 20%/5% All Around, Clear Side Markers, Berk w/ JWT Filter, SS brake lines, Volk TE37, Maxxtuning front lip, Stillen sides and rear lip, 300z BBK, SSIM, Xtreme Eyelids, NWP Thermal Intake Manifold Spacer, Truax SFCs, Clear Corner, Rainbow speakers, Eclipse AVN 6610, Hifonics amp, Epic 160, HS Headers, Cattman 3" catback
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06-06-2008, 06:16 AM
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#30
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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Quote:
Originally Posted by MaximusMorpheus
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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I do mine every time I clean my K&N. |
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06-06-2008, 06:18 AM
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#31
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Senior Member
Join Date: May 2005
Location: SO FLO, FLO RIDA
Posts: 685
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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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06-06-2008, 06:36 AM
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#32
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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Quote:
Originally Posted by amomaxima
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
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 That stuff dries in seconds, more like evaporates. |
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06-06-2008, 07:00 AM
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#33
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Senior Member
Join Date: May 2005
Location: SO FLO, FLO RIDA
Posts: 685
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not in south florida where the humidity is 100% 24/7/365
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06-06-2008, 07:00 AM
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#34
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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 I'm lucky to exceed 12% here. |
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06-06-2008, 10:53 PM
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#35
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Member
Join Date: May 2008
Location: Shelbyville, TN
Posts: 32
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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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06-07-2008, 08:57 AM
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#36
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by NmexMAX
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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06-07-2008, 08:58 AM
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#37
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by MaximusMorpheus
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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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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06-07-2008, 09:02 AM
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#38
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Senior Member
Join Date: Sep 2007
Location: Omaha, NE
Posts: 1,646
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Quote:
Originally Posted by AJ~
Excellent.
Is the CRC product the only one to use, or are there others worth using?
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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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06-07-2008, 09:20 AM
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#39
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dot dot dot ...
Join Date: Dec 2000
Location: Espanola, NM
Posts: 35,896
Points: 43,420, Level: 100 |
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Quote:
Originally Posted by jasonmax
but still needs to dry, not to dry the cleaner, but the moisture that happens when cleaner vaporises.
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Evaporate? |
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06-07-2008, 08:34 PM
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#40
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Supporting Maxima.org Member
Join Date: Oct 2007
Posts: 264
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nice write up, adding this to the list of junk to do
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06-07-2008, 08:34 PM
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