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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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  #1  
Old Thu, February 16th, 2012, 08:11 PM
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Longshot270 Longshot270 is offline
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Many of the flex fuel trucks have been problematic. You'll probably have to wait until you have custom tunes if the programmer doesn't soften them up enough.
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Old Thu, February 16th, 2012, 09:26 PM
zippman1 zippman1 is offline
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Anyone else with a 5.4 flex have the same problem? How did u fix it? Thanks
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