Welcome to the North American Subaru Impreza Owners Club Friday September 19, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
View Poll Results: How often do you clean your MAF sensor?
Once a month or more 22 3.38%
When i change my oil 91 14.00%
When it needs it, I can tell by my EM or my butt dyno 158 24.31%
NevAR 382 58.77%
Multiple Choice Poll. Voters: 650. You may not vote on this poll

Reply
 
Thread Tools Display Modes
Old 01-15-2009, 10:07 PM   #76
verc
Scooby Specialist
 
Member#: 41754
Join Date: Aug 2003
Location: san ramon
Vehicle:
03 wrx
gt35r, 2.5L, meth

Default

Quote:
Originally Posted by mostasz View Post
Ok, so I just did it! Regardless that it's 22 degrees out.

I should mention that KN filter was on car for about a year, and sensor was never cleaned.

Steps:
Soaked sensor in rubbing alcohol (50%) for 15 mins.
Cleaned it with Q tips - very carefully of course, do not bend heating... thing. It looks fragile.
Do not attempt to clean actual MAF wires inside sensor, since they are even smaller and more fragile.
Sprayed it with electrical connectors cleaner, just to make sure everything is clean.
I dried it using compressed air(can), and then let it sit on the table for another 15 mins.

Pictures:

You know that's not the actual MAF sensor you're taking a picture of, right?
* Registered users of the site do not see these ads.
verc is offline   Reply With Quote
Old 01-16-2009, 01:52 PM   #77
mostasz
Scooby Specialist
 
Member#: 170512
Join Date: Jan 2008
Chapter/Region: MAIC
Location: Subaru Stars...Williamsburg/VA
Vehicle:
2012 WRX
Ice Silver

Default

Quote:
Originally Posted by verc View Post
You know that's not the actual MAF sensor you're taking a picture of, right?
Yes, I know, this is a IAT - Intake Air Temperature probe. Sensor part is inside, U can see it on last picture.
Pictures of IAT probe are there to compare before and after cleaning, and to show that something gets cleaner

So far I don't think I can feel any difference...

Last edited by mostasz; 01-16-2009 at 10:40 PM. Reason: I called IAT a heater probe, so had to fix it...
mostasz is offline   Reply With Quote
Old 01-16-2009, 10:27 PM   #78
Badmunky
Scooby Specialist
 
Member#: 143391
Join Date: Mar 2007
Chapter/Region: MWSOC
Location: Michigan
Vehicle:
2007 WRX TR
R.I.P Colin! :(

Default

Mine was not bad at all. I did not see any change in how the car drove after I cleaned it.
Badmunky is offline   Reply With Quote
Old 01-19-2009, 12:55 PM   #79
jacky599r
Scooby Specialist
 
Member#: 137631
Join Date: Jan 2007
Vehicle:
2006 WRX
Red

Default

is this ok to use?
http://www.voltronic-germany.com/Uni...leaner-M60.htm

states that its approved to use for air mass sensor. And able to clean multi surfaces including rubber. I suppose its safe? wanna be safe
jacky599r is offline   Reply With Quote
Old 01-19-2009, 12:56 PM   #80
jacky599r
Scooby Specialist
 
Member#: 137631
Join Date: Jan 2007
Vehicle:
2006 WRX
Red

Default

deleted

Last edited by jacky599r; 01-19-2009 at 12:57 PM. Reason: dbl post
jacky599r is offline   Reply With Quote
Old 01-20-2009, 07:24 AM   #81
PJLFC
Scooby Newbie
 
Member#: 102367
Join Date: Dec 2005
Location: Liverpool,UK
Vehicle:
06 Forester STi
Crystal Grey

Default

PJLFC is offline   Reply With Quote
Old 01-20-2009, 10:49 PM   #82
thunder_lizard_1976
Scooby Newbie
 
Member#: 145642
Join Date: Apr 2007
Chapter/Region: Tri-State
Location: Barto, PA
Vehicle:
2007 WRX Ltd
Cuz Chicks Dig The Wagon

Default

I almost forgot entirely the importance of cleaning the MAF on a turbo engine..for some strange reason, the butt dyno notices the most gains immediately after the cleaning.. but actual numbers take days of ECU stabilization and relearn...
thunder_lizard_1976 is offline   Reply With Quote
Old 03-11-2009, 11:18 PM   #83
byah
Scooby Newbie
 
Member#: 177898
Join Date: Apr 2008
Location: Provo, Utah
Vehicle:
2005 WRX STi
Crystal Metallic Grey

Thumbs up

Just wanted to say that today I cleaned my MAF (Mass Air-Flow Sensor), and the idle is wayyyyyyyy smoother, shifting from neutral into first-gear used to sometimes seem to come dangerously close to stalling, but this is no longer a problem! These effects were immediate. Hopefully my gas mileage will improve, we'll just have to wait and see.. oh and FWIW, the screws holding the sensor in place looked like they'd never been touched. My 05 sti has like 72K miles and this service might never have been performed...on my car. Scary.


Some advice I would give from my experience- I don't think you really need to buy the maff cleaner. Q-tips and isopropylene (rubbing alcohol) would have worked just as well.

From now on I'll be doing this with every oil change. Takes just a couple of minutes and it can make quite a difference!
byah is offline   Reply With Quote
Old 04-09-2009, 02:29 AM   #84
ZOMBIEWAGON02
Scooby Newbie
 
Member#: 206319
Join Date: Mar 2009
Chapter/Region: NWIC
Location: 541
Vehicle:
2002 Outback Sport
Green...mostly

Default

where do I get at this pos at from?? any pics??
ZOMBIEWAGON02 is offline   Reply With Quote
Old 04-09-2009, 07:31 AM   #85
SBW
Scooby Specialist
 
Member#: 38469
Join Date: Jun 2003
Chapter/Region: NESIC
Vehicle:
07 LGT spec-b
Crystal Grey Metallic

Default

Quote:
Originally Posted by nhluhr View Post
not if you do it correctly.

which means:
-carefully remove it from the intake
-spray cleaner onto the IAT probe (the part you can see that looks like a tiny kernel of red corn)
-spray cleaner indirectly up into the hollow of the tube to clean the heater wires. You should avoid blasting the heater wires directly, as it could damage them somehow.
-let air dry
-carefully replace MAF, beign sure to get it pointed the correct direction (plug in front, not in back)
-reset ECU to clear out the AF Learned trims
instructions for those who cant check the first page
SBW is offline   Reply With Quote
Old 04-10-2009, 09:17 PM   #86
ezil71
Scooby Specialist
 
Member#: 207118
Join Date: Mar 2009
Chapter/Region: NWIC
Location: West Linn, OR
Vehicle:
2003 Wrx Wagon

Default

Quote:
Originally Posted by flycaster View Post
Not that cleaning these things off once in a while (especially if you use an oiled filter) is a bad idea, but has anyone ever really solved a problem by doing it? I just can't recall reading where someone sprayed the unit, and then said 'eureka, my car was transformed' or 'my idling problem immediately went away.'

Yep. Just did this today after finding this thread. I have 60k, never cleaned it, and found this board trying to figure out why my car felt like crap. Couldn't feel the turbo kick in.

First I discovered the air filter box wasn't seated properly (also reset the ecu)

that helped a bit

over a week later - I cleaned the MAF in some rubbing alcohol.

Immediately felt the turbo kick in again! Can feel a much stronger pull from it.

Please make this thread a sticky in the FAQ's!

Thanks for posting this!
ezil71 is offline   Reply With Quote
Old 07-13-2009, 03:12 PM   #87
DrewDeezy
Scooby Specialist
 
Member#: 160279
Join Date: Sep 2007
Chapter/Region: NWIC
Location: Richland, WA
Vehicle:
2004 STi
Crawford Performance

Default

meh.. need to do mine at the end of this week im thinking
DrewDeezy is offline   Reply With Quote
Old 08-01-2009, 02:13 AM   #88
TreyS
Scooby Specialist
 
Member#: 42478
Join Date: Aug 2003
Chapter/Region: South East
Location: Atlanta, GA
Vehicle:
2004 WRX STi
White/Gold

Question

Quote:
Originally Posted by nhluhr View Post
just fyi - if you do mess up that little o-ring, replacements are hard to find. i had to resort to using a completely different o-ring and "making it fit"
What other o-rings can be used? I have one that is nicked and needs to be replaced. Don't want to buy a new MAF if I don't have to.
TreyS is offline   Reply With Quote
Old 08-01-2009, 02:12 PM   #89
TreyS
Scooby Specialist
 
Member#: 42478
Join Date: Aug 2003
Chapter/Region: South East
Location: Atlanta, GA
Vehicle:
2004 WRX STi
White/Gold

Default

I went to my local True Value hardware store and found these...



TreyS is offline   Reply With Quote
Old 08-12-2009, 10:56 AM   #90
udelslayer
Scooby Specialist
 
Member#: 117214
Join Date: Jun 2006
Chapter/Region: South East
Location: Youngsville, NC
Vehicle:
2003 WRX Wag'n Wagon
You can have.

Default

I was skeptical. I was afraid to touch the 300 dollar maf sensor. Its delicate and I know plenty of people who have broken them on Nissans.... I've never touched the MAF on this car, and its got 60k of my mileage, and 120k of total mileage. I thought my boost was lackluster and I felt the car was slower or I had just gotten used to driving it. I had studdery acceleration, gas mileage bad, and thought that my Clark Turner etune was not much better than the COBB OTS Stage II...

I cleaned the maf this morning. Right before I left on my 34 mile drive to work. I sprayed it down with CRC electronics cleaner. I did NOT reset the ECU or change the air filter.

I dont know if its placebo because I'm paying attention, but I can SWEAR that the accel is much smoother, the car pulls stronger at 2000 rpm and I notice that the Lamco boost gauge needle jumps up to full boostness way faster than it has in the past. Its the cheapest 10 minute maintenance work I've done that been most satisfactory.
udelslayer is offline   Reply With Quote
Old 08-12-2009, 01:42 PM   #91
Badler
Scooby Guru
 
Member#: 133597
Join Date: Nov 2006
Chapter/Region: SCIC
Location: Orange
Default

I have 85k and have never done this. :facepalm:
Badler is offline   Reply With Quote
Old 08-13-2009, 04:55 AM   #92
fastwrx25
Scooby Guru
 
Member#: 126441
Join Date: Sep 2006
Chapter/Region: SCIC
Location: TPE
Vehicle:
03 bugeye

Default

^^please do...speaking of which. Its time for me to do mine again too.

gonna pick up some o rings and hex allen bolts to replace stock.
fastwrx25 is offline   Reply With Quote
Old 08-13-2009, 11:11 AM   #93
hvymetal86
Scooby Newbie
 
Member#: 203034
Join Date: Feb 2009
Chapter/Region: MAIC
Location: Whitehall, PA
Vehicle:
2001 VW Jetta TDI
Blue

Default

I just cleaned mine after reading this thread!
hvymetal86 is offline   Reply With Quote
Old 08-14-2009, 11:17 AM   #94
Badler
Scooby Guru
 
Member#: 133597
Join Date: Nov 2006
Chapter/Region: SCIC
Location: Orange
Default

Quote:
Originally Posted by udelslayer View Post
I was skeptical. I was afraid to touch the 300 dollar maf sensor. Its delicate and I know plenty of people who have broken them on Nissans.... I've never touched the MAF on this car, and its got 60k of my mileage, and 120k of total mileage. I thought my boost was lackluster and I felt the car was slower or I had just gotten used to driving it. I had studdery acceleration, gas mileage bad, and thought that my Clark Turner etune was not much better than the COBB OTS Stage II...

I cleaned the maf this morning. Right before I left on my 34 mile drive to work. I sprayed it down with CRC electronics cleaner. I did NOT reset the ECU or change the air filter.

I dont know if its placebo because I'm paying attention, but I can SWEAR that the accel is much smoother, the car pulls stronger at 2000 rpm and I notice that the Lamco boost gauge needle jumps up to full boostness way faster than it has in the past. Its the cheapest 10 minute maintenance work I've done that been most satisfactory.
Same here. Finally did it and it really does feel smoother/peppier. I did NOT reset the ECU either. Placebo effect? I don't think so. I am going to keep an eye on gas mileage too.
Badler is offline   Reply With Quote
Old 10-13-2009, 05:07 PM   #95
bangedlegacywagon97
Scooby Newbie
 
Member#: 215017
Join Date: Jun 2009
Chapter/Region: NWIC
Location: Redmond WA
Vehicle:
97OB 2004 civic
:-)

Default

Do NA engines like the EJ22 also require the MAF to be cleaned often?
bangedlegacywagon97 is offline   Reply With Quote
Old 10-13-2009, 05:43 PM   #96
AWDenvy
Scooby Specialist
 
Member#: 202140
Join Date: Feb 2009
Chapter/Region: RMIC
Location: West Jordan, UT
Vehicle:
1998 2.5 RS
RBP

Default

Hmmm. I'd like to know if WD40 is an acceptable cleaner.
AWDenvy is offline   Reply With Quote
Old 10-13-2009, 06:02 PM   #97
bannerd
Scooby Newbie
 
Member#: 110771
Join Date: Mar 2006
Location: Upstate NY
Vehicle:
2006 WRX
black

Default

Quote:
Originally Posted by AWDenvy View Post
Hmmm. I'd like to know if WD40 is an acceptable cleaner.
It will leave a oil residue, I wouldn't use it. You need a liquid that will dissolve.
bannerd is offline   Reply With Quote
Old 10-13-2009, 10:26 PM   #98
constantino7491
Scooby Specialist
 
Member#: 187358
Join Date: Aug 2008
Chapter/Region: South East
Location: Palm Beach/Miami, FL
Vehicle:
08 BMW 328

Default

Quote:
Originally Posted by bannerd View Post
It will leave a oil residue, I wouldn't use it. You need a liquid that will dissolve.
evaporate?
constantino7491 is offline   Reply With Quote
Old 02-08-2010, 01:24 AM   #99
bryantkalagian
Scooby Specialist
 
Member#: 226391
Join Date: Oct 2009
Chapter/Region: SCIC
Location: San Clemente
Vehicle:
01 Silverado

Default

Quote:
Originally Posted by nhluhr View Post
not if you do it correctly.

which means:
-carefully remove it from the intake
-spray cleaner onto the IAT probe (the part you can see that looks like a tiny kernel of red corn)
-spray cleaner indirectly up into the hollow of the tube to clean the heater wires. You should avoid blasting the heater wires directly, as it could damage them somehow.
-let air dry
-carefully replace MAF, beign sure to get it pointed the correct direction (plug in front, not in back)
-reset ECU to clear out the AF Learned trims

noob question: what are the heater wire and the hallow?
bryantkalagian is offline   Reply With Quote
Old 02-08-2010, 03:49 AM   #100
hvymetal86
Scooby Newbie
 
Member#: 203034
Join Date: Feb 2009
Chapter/Region: MAIC
Location: Whitehall, PA
Vehicle:
2001 VW Jetta TDI
Blue

Default

Quote:
Originally Posted by bryantkalagian View Post
noob question: what are the heater wire and the hallow?
The hollow of the MAF is the open inside of the tube going up from the bottom (farthest into the intake when it's installed) to the top with the plug. The heater wires are very hard to see, but they're up inside the hollow tube. When it says indirectly spray it means not straight up into the tube, but angled so the spray hits the walls of the tube before it hits the heater wires.
hvymetal86 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How often do you change your synth oil in your wrx D-I-Z-Z-L-E Factory 2.0L Turbo Powertrain 58 12-03-2012 08:30 PM
How often do you wash your hair (if you have any)? HoRo1 Off-Topic 33 12-02-2003 03:22 PM
How often do you clean your K&N/reusable air filter??? megatron Factory 2.0L Turbo Powertrain 1 10-18-2002 11:05 AM
how often do you wash your car? inpreza kid Canada Region Forum 12 02-24-2001 05:07 PM
How often do you clean your rims? John2.5RS General Forum Archive 12 05-22-2000 08:02 AM


All times are GMT -4. The time now is 12:25 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.