Throttle Controls: Dashpot
WARNING: This page is about a different car, the 1995 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Shift transmission into Neutral. Run engine at operating temperature. Ensure idle speed is 650-750 RPM. See CONNECTING TACHOMETER under INTRODUCTION. Push dashpot rod all the way with a screwdriver and verify engine speed is 1800 RPM. If engine speed is not as specified, turn dashpot adjusting screw as necessary.