Throttle Opener: Es300
WARNING: This page is about a different car, the 2002 Lexus RX 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
Start engine and warm engine to normal operating temperature. Ensure idle speed is 650-750 RPM. Disconnect and plug vacuum hose at throttle opener near throttle body. See Fig 1. Note engine speed. Engine speed should be 1100-1700 RPM. If engine speed is not 1100-1700 RPM, replace throttle body. See THROTTLE BODY under FUEL SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article.