Discussion: How to clean a Mass Air Flow Sensor (MAF Sensor)

ScottyBoy

The LED Man
Apr 6, 2012
1,320
21
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I decided to clean my MAF sensor. Here is the basic rundown on how to do this quick and simple task on your own truck. It took me about fifteen mintes total. My truck is a 2001 Suburban, but most trucks should be similar. The cleaning process is the same.
First, get a can of CRC Mass Air Flow sensor cleaner from your local parts store, or wherever else you can find it. I found some at my local O'Reillys auto parts store for about 7 bucks a can. Pep Boys also has it. Advance and Autozone stores near me do not carry it. I didn't check anywhere else.

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Now you need to remove your MAF sensor from the truck. It will be mounted in the air intake tube next to or near your air filter box.
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It will most likely be held on with some type of clamps. Mine has two stainless worm gear screw clamps. Just undo the clamps, unplug the wiring harness, and you should then be able to remove it.
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Here is how dirty mine was.
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Now simply just spray the sensor off with the cleaner. Be careful to not touch any of the metal bands or wires that span across the inside. I cleaned off the mesh with a back and forth sweeping motion. Here, this pic shows it halfway cleaned.
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Once you get it all sprayed off and clean, let it dry off. Do NOT put it back on the truck till it is dry. Here is mine all cleaned up now.
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Looks good as new! :thumbsup:
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No just go install it back in your truck. Installation is reverse of the removal process. Just make sure you do NOT forget to plug the wiring harness back onto it. Get your clamps all tightened up and you are done! :thumbsup:
 
Now simply just spray the sensor off with the cleaner. Be careful to not touch any of the metal bands or wires that span across the inside. I cleaned off the mesh with a back and forth sweeping motion. Here, this pic shows it halfway cleaned.

This, don't touch it with your hands or the spray? Which side do you spray?
 
Don't touch it with your hands, spray it on the side that doesn't have the sensor. It's ok if the sensor gets the cleaner on it just don't spray the sensor directly.
 
I used brake clean on mine, sprayed it in the lid, dipped a qtip in it and very gentley wiped the sensor itself. I was in a pinch, couldnt find MAF cleaner locally and it was throwing a code, I think I over oiled my K&N filter. That was about 10,000 miles ago.
 
Don't touch it with your hands, spray it on the side that doesn't have the sensor. It's ok if the sensor gets the cleaner on it just don't spray the sensor directly.

^^THIS. I did a lot of reading about this before I cleaned mine. Everyone says don't touch it with your hands. One site said a toothbrush was OK if you were gentle. But I would rather be safe than sorry. I only sprayed it, did not touch it with ANYTHING but the spray. I allowed it to air dry for well over two hours before I put it back on the truck.
 
When I did mine, the hp gauge I have said I gained 13. :shrug:

























:jester:
 
its been a few years, i should probably do this again get a few better miles, im prolly about due for spark plugs again as well
I have a set of spark plugs for a new body style. With around 40,000 miles on them ac delco.


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