Hello everyone, the first thing I did to my car was replace the spark plugs, clean the DMRV, and the throttle body. After that, idle RPMs fluctuate), instantaneous fuel consumption is unpredictable), pedal response is vague.
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How is throttle adaptation done on a ls600, here's what I found online.
1) Ensure the vehicle is fully warmed up.
For example, immediately after long driving with the engine running without coasting and no regenerative braking. This ensures that the coolant is at operating temperature (there’s no need to actually measure the coolant temperature if you warm up the engine sufficiently and don’t let it idle too long before performing the procedure).
Park the vehicle and turn off the ignition.

2) Turn on the ignition and wait for READY. In a stationary car, shift into D position while holding down the brake pedal, press the gas pedal to load the engine at 45% of its maximum power or higher (I think it can be determined by personal feel since there's no tachometer on the Prius). The engine control system will automatically limit the engine load regardless of how far you push the pedal, so pressing isn’t critical as long as it’s above 45%. Keep the engine loaded for 30 seconds but not longer than 40 seconds (this procedure charges the battery to maximum capacity).

3) Engage park P and turn off the ignition.
4) Wait for 5 seconds.
5) Turn on the ignition and wait for "Ready".
6) Ensure that the air conditioner and heater are turned off.
6) Slightly press the accelerator pedal, and immediately release your foot from the gas pedal as soon as the engine starts, let the engine idle until it shuts off by itself.

The adaptation procedure is complete.