I have been searching and I can't find anything on it. How does a manual iacv look and a auto iacv look and the throttle body look like? I think my car acts up because it has the manual iacv when it's automatic. Can anyone help me sort this out? Thanks!

 

They are different. Get an auto one and it'll help. It's in the stickies, just look up auto to manual swaps and you'll find guidance.

 

For the 96-00 chassis, one mounts to the throttle body and has a 3 wire plug, while the other mounts to the back of the intake manifold and has a 2 wire plug.

 

I was wondering, if the iacv could cause rpm bouncing?

 

Yes, it can. You're straying into "easily searched information" territory. Give that search button a click, and do some reading.