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Soot in air box

4K views 4 replies 4 participants last post by  Larry1013 
#1 ·
I changed out the air filter this morning on the truck and the bottom of it was pretty black. On closer inspection, it looked like there was soot in the bottom half of the airbox. I didn't get a picture of the air box but did the filter. What do you guys think?


Also it turns out some ford tech lost his screwdriver in the engine bay. From the looks of it, it has been there for a little while...
 

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#2 ·
Air filter looks normal.

Here was mine..

 
#5 ·
There is also a foam pre-filter in the bottom of the air box. It should be replaced periodically.

Foam Pre-filter Motorcraft p/n FA-1909
 
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