How to slow down the idle on a 88 honda crx si?

I recently put a motor in a 88 honda crx SI the person I bought it from took the original motor out to put a bigger one in but never did. I put the original motor back in and hooked everything up. It cranks but it idles at 3000 rpm's. How do I slow down the idle?

John is correct. The Throttle Body injection cable is not installed correctly.

Adjust the throttle body cable i believe

Not sure