[Image of the vacuum diagram for a 1988 Toyota Supra]
Legend:
* 1 - Fuel Pressure Regulator
* 2 - Intake Manifold
* 3 - Throttle Body
* 4 - Idle Air Control Valve
* 5 - EGR Valve
* 6 - Cruise Control Vacuum Reservoir
* 7 - Brake Booster
* 8 - Power Steering Pump
* 9 - Vacuum Check Valve
* 10 - Vapor Canister Purge Valve
* 11 - Fuel Tank