I just upgraded from a 90 Accord EX with 249k miles on it, to a 99 Civic SI with 43k miles. I bought the car last tuesday, had test driven it multiple times. On wednesday, at a stop light, the car stalled out, and no i didn't let off the clutch or anything it just died. Started it back up, died again. So i started it once again, this time raises the tach to 2000 RPMs. The car stayed on, and didn't have anymore problems. Then on thursday car died again on me, and this time it would not start back up. Just kept cranking and cranking. Battery, Starter, and Alternator were all fine. Acted like the ignition coil was dead. I was able to start the car, and took it back to the dealer since a i had a warranty. They kept the car for a day, and couldn't get the car to repeat what it was doin. So i picked the car up, and it ran fine until today (Tuesday). I even put 400 miles on the car between the last time it died. Does anyone know what the problem could be, or has anyone seen this before? I know the car sat for about 6 months. So could it just not be used to being driven? lol Any answers will be greatly appreciated.