my ai does not work

I am currently working on a car racing game and am making an ai vehicle to race against . Currently its only job is to drive forward by setting the throttle to 1, i know that part is working because i print the throttle and it is 1 The gear is automatic and is set to first but it dosnt work unless its possessed by a player. The print blueprint is in the ai vehicle and so is the throttle, i made an ai controller but it is empty and it is set to automaticly possess the pawn on spawn I spawn it in world blueprint .