Ported EGR Valve
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2005 Saab 9-2X, 1995 Saab 900, 1994 Saab 9000, 1994 Saab 900, and 1993 Saab 9000. However, it is still accessible from the selected car via links, so may be relevant.
Warm engine to operating temperature. Disconnect Red-stripped hose from modulator valve. Apply vacuum to hose. If engine RPM drops, EGR valve is okay. If engine RPM does not drop, check hoses, connections, and vacuum tank.