Ayyy, sup Couger? When it was doing that for my game, it was because I had too many car mods. I had, I think, 25 or so cars, mostly larger mods like the G8, A4 Allroad, etc, as well as larger tracks. Nurburgring caused the same problem, so I deleted the Nurburgring, the A4, and the G8, and just removing those 3 caused my game to work again. However, don't try loading any careers that used those cars, as it will usually corrupt your save game.