Over the past two months occasionally ill come out to my car in the morning, try to start it, it starts then dies, i try again and it starts. Now this next thing is a regular occurence. While sitting stopped at a light with the car in drive ill watch my voltage drop down between 12.90V - 13.3v along with this my idle drops and then picks back up along with the voltage to about 13.8v-14.1v. Crusing im seeing about 14.5v-14.8. Now ive read some posts and tried one thing so far. I cleaned up the ground wire for the battery and that didnt fix a thing. The battery is the orginal, 45k on the car, about 4 years old. I am just looking for a simple solution or a different direction to be looking. I just hope its not the alternator going. Any thoughts?