Some what confused.
The Autozone website lists the same adjustment procedure and data for this engine as the 1MZ-FE. Their procedure uses the clearance between the stop screw and lever and compares this to a listed ohm reading range.
On most Toyota setups the throttle stop screw does not set idle. Idle is controlled by the computer via the intake air control valve. The purpose of the stop and vacuum plunger device is to keep the throttle plate from sticking closed. The plunger opens the throttle plate a little when the engine is off.
If using the AC the idle will jump a little to compensate for the compressor load then drop down. Same when turning it off, the RPM will jump a little then return to normal.
You might be better off readjusting the screw to where it should be then going to the method of measuring the clearance between screw and lever.
Does this help you?
Here is the link:
https://www.autozone.com/az/cds/en_u...rInfoPages.htm
