How-To: Clean The MAF Sensor

amsgator

03.5 Protege5
:
Yellow '03 5-Speed MP5
Someone please move this to the how-to section. Thanks!!!

Well, after the other "how-to" did a whole lot of nothing other than tell you what the MAF was and what can happen to it, I decided to clean mine today. So here is the how to I made in the process, I hope it helps guys!!! If I left anything out feel free to let me know and I will add it in or you can post it in a separate post.

Difficulty: EASY
Time: 10 minutes

IItems Needed:

*CRC Mass Air Flow Sensor Cleaner (can get at any autoparts store by the brake cleaner)- make sure it has the straw with it. Other people have use electronics cleaner, but I would play it safe when working with something this sensitive and expensive.

*Flat Head Screw Driver

*10mm Socket

<img src="http://www.crcindustries.com/catalog/images/Cleaners%20and%20Degreasers/05110.jpg"

This how to is based on aftermarket intakes, if you have the stock airbox, accessing your MAF sensor will be different, but the rest is the same.

(The MAF sensor is the black box)

<img src="http://i39.photobucket.com/albums/e159/sockerdood/Car%20Pics/DSC01105.jpg"

First thing you need to do is unplug the wire harness that is connected to the MAF sensor (be sure to plug this back in when you are done or the car will run like total crap).

Undo the 10mm nut that connects the MAF housing to the bracket and once unplugged, loosen the clamps on the couplers so that you can pull the box out of the intake.

<img src="http://i39.photobucket.com/albums/e159/sockerdood/Car%20Pics/DSC01106.jpg"

One side of the box will have plastic grating (the part that faces the front of the car) and the other will be unblocked. You will see a thin wire hanging inside the MAF housing, DO NOT TOUCH THE WIRE OR IT WILL BECOME DAMAGED AND YOU MAY NEED TO BUY ANOTHER WHICH IS ABOUT $200. Sorry for the blurry picture but in order to get close enough to see it in the picture it blurred it a little.

<img src="http://i39.photobucket.com/albums/e159/sockerdood/Car%20Pics/DSC01108.jpg"

Take the MAF sensor cleaner and spray the sensor about 10 times on each side, you will have to stick the straw through the grating but don't touch the sensor and don't get too close or the force from the spray may damage it as well. Once you have sprayed the sensor on both sides you can assemble the intake in reverse order of how you took it apart. Let the sensor dry before you start the car again. Be sure to plug all harnesses back in. And while you are there you can also wipe off the IAT (intake air temperature), but be sure to put that back in as well.

Well that's about all their is to it. If I left anything out let me know or feel free to post below. I hope this helps. It's really easy to do and takes hardly any time, just be careful with the sensor as it is VERY fragile and VERY expensive. Enjoy!

Aaron
 
Wich way does that thing go in? The Mesh facing the front or the the non mesh facing the front?
 
I was actually getting a 0300 code and I cleaned my MAF using this and well I havent got the code back yet...
 
"Some MAF sensors, Nissan for example, use a "burn-off" system. When the engine is turned off a high voltage is sent through the hotwire to burn off any dirt or other contamination that may have accumulated on it. This helps keep the MAF accurate."

That's from the web link you posted. If our cars do this then why bother with the cleaning? Sounds a little risky for some rather vague reasons to tamper with a $200 wire. Yikes.
 
but does the protege 5? there isnt really anything risky as long as you don't go poking the wire.
 
Tasty said:
"Some MAF sensors, Nissan for example, use a "burn-off" system. When the engine is turned off a high voltage is sent through the hotwire to burn off any dirt or other contamination that may have accumulated on it. This helps keep the MAF accurate."

That's from the web link you posted. If our cars do this then why bother with the cleaning? Sounds a little risky for some rather vague reasons to tamper with a $200 wire. Yikes.

Why argue? if the MAF sensor is the issue and your having misfire problems because of it you can

A: attempt to clean the MAF sensor and hope it works so your not out 200.00

B: complain that your MAF is a POS and spend 200.00 on a new one..

I dont get the fourm sometimes, the guy is posting information that is attempting to help cure a problem and all you can say is

"gosh gee guys i dunno sounds risky"
 
Matthew1785 said:
Why argue? if the MAF sensor is the issue and your having misfire problems because of it you can

A: attempt to clean the MAF sensor and hope it works so your not out 200.00

B: complain that your MAF is a POS and spend 200.00 on a new one..

I dont get the fourm sometimes, the guy is posting information that is attempting to help cure a problem and all you can say is

"gosh gee guys i dunno sounds risky"

Wow, relax. I wasn't trying to argue. That's the problem with forums, you can't convey tone very well. I was merely asking and making a point. I think it's a good idea if you need to do it, but I PERSONALLY would be a little nervous about f-ing the wire up.
 
Tasty said:
Wow, relax. I wasn't trying to argue. That's the problem with forums, you can't convey tone very well. I was merely asking and making a point. I think it's a good idea if you need to do it, but I PERSONALLY would be a little nervous about f-ing the wire up.


if you are using specifically formulated MAF cleaner and use it according to the directions, there is no way possible to mess the MAF needle up.

now if you reach in and start rubbing on it with your hand, then Im sure youre going to have issues...
 
B1GHAM said:
if you are using specifically formulated MAF cleaner and use it according to the directions, there is no way possible to mess the MAF needle up.

now if you reach in and start rubbing on it with your hand, then Im sure youre going to have issues...

yeap. exactly. that's why i didnt buy the electronics cleaner that some people use on theirs. the MAF cleaner was like a dollar extra but I didn't want to take the chance so I went ahead and got what was made to clean the MAF. :) I didn't want to gamble just to save a dollar.
 
ok, it looks like this will be a protege5 only thread then. will someone move this or explain why it cannot be moved?
 
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