Possible Causes:
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 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.