i have managed to fix the issue. i have installed a huge carpack with all kinds of new models added to the mod file. certain car models may be corrupt, in that case you need to remove all your mods and start all over with modding in gta till you find the mod that caused it. and that is what i did.
the carpack i installed was located in my EMF folder in the dlc lists.
i just removed the EMF folder and readded the backup of the earlier version of the EMF folder back in DLC folder.
the game works normal again.
in other words... check your mods before you install them or make a backup once a while of the mod folder when you install a mod and it works.