Variable Tumble Control System (VTCS) Check Valve (One-Way)
VARIABLE TUMBLE CONTROL SYSTEM (VTCS) CHECK VALVE (ONE-WAY) REMOVAL/INSTALLATION1. Disconnect the negative battery cable.
2. Remove the air hose, throttle body and intake manifold.
3. Remove in the order indicated below.
1. Vacuum hose
2. VTCS check valve (one-way)
4. Install in the reverse order of removal.