S7 - Check Vacuum Manifold Source

- Key "OFF".

- Manifold Absolute Pressure (MAP) vacuum hose from manifold vacuum tee disconnected.

- Install vacuum gauge to manifold vacuum tee.

- Start/crank engine.

- Is manifold vacuum present at the vacuum tee?

Yes -- Remove vacuum gauge. Reconnect vacuum line to MAP sensor and manifold vacuum tee. Go to S8. S8 - Check EGR Vacuum

No -- Remove obstruction in manifold vacuum tee or replace damaged manifold vacuum tee. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)