Problem with car modding

[ColumbineFun]

So lately i want to goof around a bit with blender and car modeling. I imported kunos official model to edit it and see how things looking to start things off. I removed just bumpers windows and doors, exported car to KsEditor and all i see is black ball or car in the sky. When i resave it to KN5 and opend up in game i just see wheels , couple of black shadows and driver. Any idea where im making mistake? Would love to re-edit some official cars for fun or even create a new one but im stucked with that error