Here are the steps on how to remove the intake manifold on a 2005 Ford Focus:
1. Disconnect the battery.
2. Remove the air intake hose.
3. Remove the throttle body.
4. Remove the fuel injector rail.
5. Remove the intake manifold bolts.
6. Lift off the intake manifold.
Be sure to replace the intake manifold gasket when you reinstall the intake manifold.