1990 Pontiac Sunbird 1990 pontiac sunbird no spark

I have checked the coil, computer, changed the module, rotar and cap, checked power going in, fuses, wires, everything seems to be fine but I am not getting spark out of the distributer. If the timing is off can that cause no spark at all? Car was running rough, would not go over 65 MPH, died and now no spark. Any help appreciated.