4 Runner 2WD L4-2693cc 2.7L DOHC MFI (1997)
Throttle Opener: Testing and Inspection
THROTTLE OPENER INSPECTION
(a) Warm up engine
Allow the engine to warm up to normal operating temperature.
(b) Check idle speed
Idle speed: 650 - 750 rpm
Vacuum Hose Disconnection
(c) Disconnect the vacuum hose from the throttle opener, and plug the hose end.
(d) Check the throttle opener setting speed.
Throttle opener setting speed: 1,200 - 1,500 rpm
If the throttle opener setting is not as specified, replace the throttle body.
(e) Stop the engine.
(f) Reconnect the vacuum hose to the throttle opener.
(g) Start the engine, and check that the idle speed returns to the correct speed.
