Rebuilt engine experiencing high idle?

The first thing I would do is run the codes. Here is a guide to help. Also, disconnect the throttle cable from the throttle body, it might be holding the throttle open.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/engine-idles-too-high

I would check the EVAP purge solenoid, once removed you should not be able to blow through it.

Basic Idle rpm (After warm up)

A/C OFF .................... 700 ± 100 rpm
A/C ON .................... 750 ± 100 rpm

Here is the location of the valve so you can check it out. Check out the images (below). Please upload pictures or videos in your response of the problem so we can see what's going on.