CAR HAS1200.00 bucks done so far 0ne weekend it goes fine the next it stalls frequently when it gets over 80 degrees outside.friends say to replace computer see if it cures it,i'm afraid it won't matter can it be tested somewhere?It has power fuel pump i noticed when stall occurs will work and sometimes not that is a suspect.GM people told me not to worry about fuel pump cause they say it will only quit working not be a gradual thing.so someone tell me what to do.