Possible Causes
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. 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 air induction system. If air induction system allows dirt to enter cylinders, it will quickly "dust" the engine, causing high crankcase pressure.