Tacoma With M/T & 4Runner With M/T

Start engine and warm engine to normal operating temperature. Ensure idle speed is within specification. See IDLE SPEED & MIXTURE in ON-VEHICLE ADJUSTMENTS - V6 & V8 article. Shut engine off. Remove cap, filter and separator from dashpot on throttle body. See Fig 1.
Start engine. Maintain engine speed at 2500 RPM. Plug Vacuum Transmitting Valve (VTV) hole in dashpot with your finger. See Fig 2.
Release throttle. Dashpot should be extended and dashpot setting RPM should be 1800-2200 RPM. If dashpot setting RPM is not within specification, rotate dashpot adjusting screw to obtain correct RPM. See Fig 3.
Remove finger from VTV hole in dashpot. Ensure engine returns to proper idle speed in approximately one second. Install separator, filter and cap. Ensure filter is installed with the coarse surface facing outward (away from dashpot).

Fig 1: Locating Dashpot & Components (Tacoma With M/T & 4Runner With M/T)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Locating Vacuum Transmitting Valve (VTV) Hole (Tacoma With M/T & 4Runner With M/T)

Fig 3: Locating Dashpot Adjusting Screw (Tacoma With M/T & 4Runner With M/T)