I managed to snap off the plastic plug of the knock sensor that's next to the bottom PHH, so I recommend removing the knock sensor before you start. There's no opening to the interior of the engine behind the knock sensor, so it's simple to remove.
Incidentally, if you ever feel like your 1FZ-FE is sluggish, try unplugging your knock sensors and driving around. No ignition advance a makes it a total slug, like it's a 3F-E or something...
Incidentally, if you ever feel like your 1FZ-FE is sluggish, try unplugging your knock sensors and driving around. No ignition advance a makes it a total slug, like it's a 3F-E or something...