Throttle Opener

Warm engine to normal operating temperature. Ensure idle speed is correct. See IDLE SPEED & MIXTURE in ADJUSTMENTS article.
Disconnect and plug vacuum hose at throttle opener, located on side of throttle body. Start engine and note engine speed. Engine speed should be within specification. See THROTTLE OPENER SPECIFICATIONS table.
If engine speed is not within specification, replace throttle body. Reinstall vacuum hose on throttle opener. Start engine and ensure engine returns to proper idle speed.

Fig 1: Adjusting Throttle Opener (Similar)

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THROTTLE OPENER SPECIFICATIONS

Application

⁽¹⁾ RPM

Land Cruiser

700-1000

⁽¹⁾	With electric cooling fan turned off (if equipped).