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)