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A Good Reason to leave the Maf Screen In


BradyPPC

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Ever thought of removing the Maf screen? While the maf screen is mainly there to straighten airflow across the mass air meter in order to provide a stable reading, it can also block debris from entering into the motor.

 

In this case, the car had a tear in the intake boot allowing dirt and debris to enter the engine behind the air filter. The dirt contaminated the mass air meter and caused a lean condition coupled with a bad hesitation under load. Cleaning the mass air meter and sealing the intake boot cured the problem.

 

Large chunk of dirt.

 

http://i548.photobucket.com/albums/ii353/brady/Tech/Maf%20Screen/DSC02988.jpg

 

Dirt, debris, and general grime.

 

http://i548.photobucket.com/albums/ii353/brady/Tech/Maf%20Screen/DSC02989.jpg

 

Tear in the boot that allowed the dirt past.

 

http://i548.photobucket.com/albums/ii353/brady/Tech/Maf%20Screen/DSC02991.jpg

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In this case, the car had a tear in the intake boot allowing dirt and debris to enter the engine behind the air filter. The dirt contaminated the mass air meter and caused a lean condition coupled with a bad hesitation under load. Cleaning the mass air meter and sealing the intake boot cured the problem.

 

Tear in the boot that allowed the dirt past.

 

http://i548.photobucket.com/albums/ii353/brady/Tech/Maf%20Screen/DSC02991.jpg

 

Hello McFly!!!!

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how did you get that much debri on your maf screen?? I have done tune ups on a could of friends cars that the air filter hadnt been replaced in a couple years and there screens didnt even look close that bad

reading owns you dont it........:gtfo:

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Seen that many times. VERY COMMON.

 

The screen does not keep the MAF "clean", its main purpose it to make sure the MAF gets "straight" air for a better signal, a by-product of having it there is to keep big stuff out of the engine.

 

The K&N Airfilter for the F-body allows this to happen all the time since the filter is not the correct height and doesn't seal to the lid properly.

 

Regular maintance will prevent stuff like this.

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If the tear was behind the MAF this thread would be pointless. I understand some of the pros to leaving the screen in, but didn't the Z06 come without a screen?

 

The biggest reason for the screen is to straighten out airflow. If the airflow is is stable across the meter without a screen, there is no need for one. In this case the screen had the added benefit of keeping crap out of the motor.

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