You did what I told you about the sound, right? Is the game still crashing?
I think you can't delete cars from games coz it will cause crashing.
Anyway use vehicle mod installer to restore all cars. Then start installing 1 car per opeoning the GTA but always use the same specyfic car from gta like turismo... start game...cheat with phone to spawn turismo and check if it works.
Or add cars by using only this vehicles as a replacements: (number - means you must call at this number BY PHONE to spawn them)
Super GT 227-555-0168
They will act funny thx to the handlings but for now just see if they spawn. If it's ok then replace any car you want.