1996 BUICK SKYLARK User Comment / Complaint

This problem is happening more frequently now i can go out to the car and it won't start. i can wait a few hours or so and it will start right up. the first time this happened i had it towed to the mechanic, the day it was towed in it wouldn't start for him either. the next day and the days following that it fired up each and every time he kept it from mon-fri, he could not duplicate the problem. he did the diagnostic test it showed nothing wrong with it. i called two buick dealers, they told me if the car doesn't break down and stay broken down they can't tell me whats wrong because the problem is too intermittent. before all this started that ets off light was coming on and staying on and the car would stall out on me, now its not doing that anymore, but i noticed something when i'm putting the car into reverse from park i noticed that the ets off light blinks. please help me if you can, i don't know what to do. and sometimes it stays on. the fuel pump seems to be working. i have had it looked at twice and no one can find anything wrong with it.