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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s

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Old Mon, November 12th, 2012, 10:11 AM
rdm_01 rdm_01 is offline
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Join Date: Nov 2012
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Default 03 Screw FX4 lean code

I'm getting lean codes on canned tow tune. I know this isn't right, but is there anything I can do other than not use it until I get custom tunes. I have the 5.4L, gotts mod, drop in k&n, and dual exhaust with a "H" pipe and flowmasters. Any help will be appreciated.


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