i have a 1997 pontiac sunfire 2.2L i have had it for about 6 months, and just within the last month it had trouble starting. sometimes when i start the car, it would stall and the theft light would flash for 5 seconds then go solid, usually i just wait for it to go solid then try again and it would work. but its getting worse, maybe every 5 starts, sixth time wont start. and now even when it does go solid after 5 seconds, i cant get it started. i tried changing the key cylinder and did the 15 minutes re-learn process, but still no luck. the car had remote start before, but i removed it.
any ideas?

also i forgot to mention the Check engine light and ETS light is one. it comes on and off every few days.

sounds like ur computer is going out to me

is that the main computer thats behind the front fender? could it be anything else? bad ground? i can't seem to figure out a pattern why its doing this, its so random, one day it starts fine all day, the next day, every other start makes the theft light come on.