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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
Tue, August 14th, 2012, 10:10 AM
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If you do not have custom tunes, take off the CAI. The early 5.4s ran lean from the factory and adding the CAI makes it much worse.
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#3
Tue, August 14th, 2012, 01:38 PM
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Tune the truck back to stock and check every few trips for DTCs. Until we have those, there is no way to be sure what is wrong.
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| 5.4l, idle, misfire, miss |
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Hybrid Mode
