[SOLVED]Car is falling apart on spawn

[devel]

I recently created my first vehicle mod with sketchup, blender, and nodesnap and when I spawned my creation in game, it just fell apart. I don't know what I did wrong, but any help would really be appreciated.

 

[steam tractor man]

nodes not all connected together, for example the nodes in the black circle should all be one node not three. also second photo is for others to see what is happening

 

[devel]

Thanks a lot for your help. What we both didn't notice, however, was that there's duplicate nodes in the exact same location, which I just found out while cleaning up. There was upwards of 10 duplicates, which probably aided in breaking my car. Nearly every node had a duplicate, and when I took care of those, the car just looked like a blank connect the dots puzzle. I went from nearly 200 nodes down to just 51