Not sure how common this line up of codes is, but they all point to the possibility of a bad ecm! Codes 15, 25, and 46.

46 is the VATS: Seldomly the car will not crank, and must be left alone for a few minutes to "chill out" and then starts right up. This has happened maybe 2 or 3 times in the period of six months. It is my understanding that code 46 is stored after this occurs.

25 & 15 Made references to the possibility of an open coolant temp sensor circuit, and bad MAP sensor.

If more detail is needed I will make a post with the exact info on the scan sheets, but I don't have them handy at this very second.

The car runs strong, and recently pulled a 14.67 at the local track (2200 ft elev. uncorrected) Just in case anyone was wondering.

 

Sounds to be right up Need4speeds alley.

I'd first try unplugging and reconnecting the ecm a few times. Then make sure the ecm gounds are good.
Multipul codes with a 730 are rare.

 

Right - Of course I need to confirm the codes are being thrown by erasing the ECM once ortwice and going thru the identified problems... I just wanted to see if this was a common pointer to a bad ECM. Possibly a notorious trinity of some sort, glad to hear it is uncommon.