YOU SAID:
auto car go vroom vroom
INTO JAPANESE
自動車はvroom vroomを行く
BACK INTO ENGLISH
Car go vroom vroom
INTO JAPANESE
車の行くvroom vroom
BACK INTO ENGLISH
Car going vroom vroom
INTO JAPANESE
車はvroom vroomを行く
BACK INTO ENGLISH
Car go vroom vroom
INTO JAPANESE
車の行くvroom vroom
BACK INTO ENGLISH
Car going vroom vroom
INTO JAPANESE
車はvroom vroomを行く
it is unlikely that this phrase will ever reach equilibrium