went in to store came out 300 se turns over won't start.towed to house checked for spark has nothing.no obvious symptoms leading up to it.has power to coil but nothing coming out.checked for blown fuses loose wires seems ok.changed out coil(had a spare)no luck.i don't have access to a diag computer(if its even possible)but do have tools/ knowledge to test electrical components.any suggestions of what to test or any known issues with the ignition system would be greatly appreciated.