Frustrating.

[ChrisC73]

Ok I have a a 2006 Expedition 5.4. It runs fine but when the engine warms up it has a significant power drop. Foot to the floor it won't accelerate until it hits about 3grand then it takes off like a bat out of hell. Park it in the driveway and when it cools off it runs fine until it warms up then it does the same thing.

 

[riphip]

Check vacuum lines for cracks rotted lines. Need to pick up a smoke machine, you'll use it more than you think on these. Also check the Fuel Pump Driver Module on the frame since you live in Salt the roads country. May be corroded at mounting bolts.