Possible Causes:
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Broken or worn compression rings
- Polished cylinder bores
- Leaking or bent valves
Inspect the air induction system. If the air induction system allows dirt to enter the cylinders, it will quickly dust the engine causing high crankcase pressure.