My 1995 Nissan Sentra cranks over but wont start, ECU has code P1320 ignition signal primary. I backprobed crank sensor w/logic probe, crank sensor gets power with ign on, but doesnt seem to pulsate when being cranked, i put another crank sensor in it, same problem,still no start. Any ideas?

check distributor/coil/ignition control module next

There could be something wrong with your flywheel, or maybe your crank shaft broke.

Remove your oil filler cap and crank the engine over, watch and see if the valves/camshaft are moving.

that code is a primary ignition system falure

replace the coils

he has one coil, and its in the dizzy. diagnose a bad coil or distributor before you throw parts at it. its probably the cam sensor or control module, but since they are in the distributor, you really cant replace just that part, you need a new distributor if thats the problem.