I am in the process of removing the 3VZE out of my 90 4runner and found this piece mounted on the driverside below and in front of the A/C condensor.
Also does anyone know the P/N for the tube that runs from the PCV valve to the upper intake manifold? I bought this truck for $300 and it was missing this hose. I am going to start the rebuild here soon, broken #6 con. rod, and want to replace all sensors, most sensors, etc. Thanks for the help guys.
Tim

 

that is the AC ballast resistor (may be called something else, not sure) but it mounts to the middle front of the core support, behind the grille/bumper and in front of the AC condensor.

 

The "ventilation hose" probably has part number 12261-65010- (probably because I'm surely missing a prefix or suffix, but this may get you started.)

I replaced mine with a piece of "ordinary" vacuum hose, but it does kink on the curve and I'd probably be better off with the right hose. Let us know what it cost you!