How do you make a car jump because the cheat won't work

2 make cars jump you just simply pressing L1,up,right,R1,triangle,circle,down,x and then you have to press down. (by doing this cheat your car will turn better, quickly and it will roll easy. and it wont work on bikes)

im the katsuyasu and i made a mistake with cheatcode. it was L1,up,LEFT,R1,triangle,circle,down,x