kryptkarma

i have been installing multiple add-on and replace police vehicles and vehicle packs and i have come across a problem where the default police vehicles are stuck as other vehicles i do not remember installing and there are tons of poorly made add-on vehicles in my game and i cant find any of them in my files. I have gone through the whole process of replacing them with new vehicles and it will not replace them. i have been going through all my vehicles.rpf files and looking through all of them and i can.not.find.them. but they are still in my game. please help asap.