Vehicle Physics problems

And i was saying, ok, I will play around with a little car prototype, just to make something fun and simple, “simple” -.-"
thanks to both for the comments, I was able to make the car work and play with the physics values. Pretty nice.

Now I am trying to import a new car… again a nightmare.
I followed the same process for the “working car”, here are the results:
(There is a kind of recording bug at the middle of the video, but I think is not big deal because you can see what I am trying to show)

https://www.youtube.com/watch?v=BTqtDDOMwas

And the blender project:

https://www.youtube.com/watch?v=zWW-JshnqSY

this is a screen when I imported the mesh:

The car that is working (i made some testing touches and the suspension and other things are a little ugly now on the video, but is working pretty well), have the same configuration that the one I am trying to import.

seems to be something related to the center/pivot point, but it is at (0 0 0) on blender project.
Some advice is welcome =)