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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


 
 
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Old Sun, January 30th, 2011, 07:55 AM
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DarkShadowSTX DarkShadowSTX is offline
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Quote:
Originally Posted by hampsterzone View Post
Moving the MAF sensor doesn't cause lean codes.

I have always read that the reason you get lean codes is because you move the MAF.

Low back pressure cause the lean codes. Which makes sense cause I never had a lean code with my edge and CAI alone.

Backpressure is supposedly just a myth. I never had a lean code with my EDGE and CAI but I did get other codes because the truck wouldn't run correctly since the CAI changed the MAF location. Custom tunes on my Gryphon fixed that. A lot of people with EDGEs and 5.4Ls got lean codes with CAIs though.
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