Should I replace my crankshaft sensor?

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As you know from the other thread my car is having some ignition issue as in jumping to 0 degrees for timing most of the time it happens in the same 1500-2500 RPM range but I had it happen yesterday while downshifting driving up to a stop light, I use torque on my phone with a alarm that goes off whenever timing hits 0 degrees.

 

Now Before I just go buying the sensor I will be replacing my plug wires but I don't have any codes for the crank or cam sensors.. I do have a sound file from the exhaust end of the car

 

http://www.megaupload.com/?d=ODWV4HJZ

 

I can't remember how many seconds in to it but you can for sure hear the timing get down to 0 degrees by the sound of the engine/exhaust.