like i said before, i used to have an 89 teg and almost the same thing happened, i changed out the ecu... and it never done it again. i would check into atleast borrowing someone elses ecu... but wait, i have heard of another thing that could happen... if your gas cap goes bad it could build up too much pressure and not start cuz all you are getting is pressurized gas feums, but when the pressue eventually seeps out of the tank it will start up... i would check your fuel filter and your gas cap... and try the ecu thing too. good luck