KN2 - Check FPRC Vacuum Hose To Manifold Source

- Key "OFF".

- Disconnect and inspect vacuum hose between the manifold vacuum source and the Fuel Pressure Regulator Control (FPRC) solenoid input vacuum port for blockage, kinks, cracks, etc.

- Is vacuum hose in good condition?

Yes -- Reconnect vacuum hose. Go to KN3. KN3 - Check FPRC Vacuum Supply

No -- Service or replace the vacuum hose as necessary. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)