On this particular car I would go ahead and replace the crankshaft position sensor located at the rear bottom of the engine just above the oil pan gasket. Here is the sensor >> http://www.autopartswarehouse.com/.../SIPC7.html
Just a bit of advice........after you remove the holding bolt, use care when removing the sensor. I would suggest that you grab the sensor from the side and twist and pull straight away from the block. The bottom line here being do not break off the head of the sensor while trying to pull it out. There is a rubber o-ring on that sensor that is usually dried out and has become hard and this creates the need for more force than you think to get the sensor out. You will notice that it is not difficult to get the sensor to rotate, but getting the sensor to move outward while rotating it will be key.This is the hard part. When using whatever tool you are comfortable with to grab and pull, you can always at the same time try to insert a screwdriver blade in there to help it along. Again, do not gorilla this sensor to get it out. If you break the head off you will need to remove the oil pan to get it out. Examine the new sensor so you know where to pull and pry and where not to.