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Joined: May 2002
Posts: 5,979
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ECelica Admin
2001 Toyota Celica GT
ECelica Admin
2001 Toyota Celica GT
Joined: May 2002
Posts: 5,979
Likes: 9
Cleaning the MAF Sensor
Pictures & Edits by jummywummy@hotmail.com

The Mass Air Flow sensor is crucial to the fuel systems operation. This is the sensor that the engine computer uses to measure how much air is entering the engine so that it may properly deliver the proper amount of fuel. A dirty MAF sensor hot wire may cause several problems to include: difficult start, poor acceleration, pinging, rough idling, to name a few. This whole procedure should take you less than ten minutes.

Use Q-Tips and "CRC Mass Air Flow Sensor Cleaner [crcindustries.com]" . A cleaner that will not attack plastic or leave a residue on the wires. Its available for about $8 USD at your local auto parts retailer.

Pics are self explanatory

[Linked Image]

1. Locate the MAF Sensor on the air Intake pipe just behind the air filter box. Remove the MAF Sensor from the air Intake pipe by removing the two Phillips screws.


[Linked Image]

2. Disconnect the MAF Sensor wire harness by pressing the tab and pulling.


[Linked Image]

3. Spray cleaner on to the platinum wires liberally to clean off any built on dirt residue. You may want to remove the rubber o-ring around the housing to prevent the possibility of the cleaning agent making it brittle.


[Linked Image]

[Linked Image]

4. Inspect the platinum hot wire inside the MAF housing. You can see the air temperature thermistor on the side in this view.

[Linked Image]

5. Replace the cleaned MAF sensor back into air Intake pipe.


6. Put it all back together and you're done.


Here is a before and after MAF cleaning dyno chart plotting torque over RPM.

[Linked Image]

There's no magical power gain, but it's a good idea to keep your engine maintained.

Check the MAF for dirt and deposits every time you check the air filter, and that should help keep your engine running at top Performance.

...

CRC Mass Air Flow Sensor Cleaner [crcindustries.com] is available for about $8 USD at your local auto parts retailer.
MAFCleaner.jpg

Joined: Jul 2003
Posts: 2,040
ECelica Staff
2004 GMC Canyon Z-71
ECelica Staff
2004 GMC Canyon Z-71
Joined: Jul 2003
Posts: 2,040
Awesome...i've had to do this for awhile...now i think i will grin

Joined: Nov 2003
Posts: 53
Member
2000 Toyota Celica GTS
Member
2000 Toyota Celica GTS
Joined: Nov 2003
Posts: 53
you always have some valuable info GREAT WORK man.. DYNO and everything what else can you ask for!!

Joined: Jun 2003
Posts: 260
El Guapo
1997 Nissan 240SX
El Guapo
1997 Nissan 240SX
Joined: Jun 2003
Posts: 260
Be careful when you do this cause if you mess up you just cost yourself a $200-$300 core.


Touge Knights - Canyon Driving Team!

Joined: Feb 2004
Posts: 8
New Member
2001 Toyota Celica GT
New Member
2001 Toyota Celica GT
Joined: Feb 2004
Posts: 8
Man Isaac I have been trying to figure out what was wrog with my car for the longest time now, thanks you just saved me some money cause I was gonna take it to the shop, who knows what they would have came up with and charged me.

Joined: Feb 2004
Posts: 255
Member
2000 Toyota Celica
Member
2000 Toyota Celica
Joined: Feb 2004
Posts: 255
Awsome work!

Something I have to look out for now...


With Style, Comes Speed
Veilside Celica GTS

Joined: Jan 2004
Posts: 98
BAC
Member
2000 Toyota Celica GT
Member
2000 Toyota Celica GT
Joined: Jan 2004
Posts: 98
i tried to disconnect it but had a hard time taking it off...is it really supposed to be hard to diconnect it??? or is it unnessary to do so?

Joined: Nov 2003
Posts: 2,223
oas
Specialist
Specialist
Joined: Nov 2003
Posts: 2,223
noob question, if i buy a new Intake do i get a new maf then since i tried to look on some pics and to me its seem like its sitting on the Intake or is it just me thats sleeeeepy

Joined: May 2002
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Likes: 9
ECelica Admin
2001 Toyota Celica GT
ECelica Admin
2001 Toyota Celica GT
Joined: May 2002
Posts: 5,979
Likes: 9

Joined: Jul 2014
Posts: 1
New Member
New Member
Joined: Jul 2014
Posts: 1
That was very useful information for finally solving a long term problem of mine.
Thanks!

Joined: Jan 2019
Posts: 8
New Member
2003 Toyota Celica GT-S
New Member
2003 Toyota Celica GT-S
Joined: Jan 2019
Posts: 8
What happened if I cleaned with carburetor cleaner? I could damage it ? And why you said 200 to 300 cost if I mess it up, I saw the part on ebay $12

Joined: May 2002
Posts: 806
Likes: 15
CelicaSpecialist
2008 Scion tC
CelicaSpecialist
2008 Scion tC
Joined: May 2002
Posts: 806
Likes: 15
Originally Posted by Er1ck
And why you said 200 to 300 cost if I mess it up, I saw the part on ebay $12

Buying from eBay vs buying directly from Toyota.

Possibly used product pulled from a salvage or damaged vehicle vs guaranteed new, never used product directly from the OEM.

Im not saying your $12 eBay part is bad, but it does require some understanding of why that part is being auctioned for only $12 vs its possible $200 retail price.

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