[RPMs surging while in park]

I just rebuilt my throttle body and finally got my 1988 Pathfinder started again. It was pretty rough starting but it coughed to life. It was fine for about 10 seconds until the RPMs started surging up and down.  Can someone please help me?

[VG30i Throttle Body adjustments]

Ive gotten it to finally start up again but now its surging when in park. The RPMs will go up and down endlessly while its sitting there. Fresh gas and everything too. When I turn it off, thin white smoke comes from around the throttle body. I have no idea what to do

[VG30i Throttle Body adjustments]

Ive recently rebuilt my throttle body and I need to know how to readjust it. I was also wondering where I might be able to find a new Idle Up solenoid. If anyone could help me out Id greatly appreciate it. My specs are below

 

1989 Pathfinder

3.0 V6 VG30i

4x4

Automatic