here's my problem. it doesn't happen all the time, but it's been doing it more often lately. i'll be going down the freeway at 60mph, the revs will just go crazy. just constantly up and down, like it's mis-firing. i thought it was the trans, but when i put it in neutral (it's an auto, btw) i can still see the tach jumping up and down. sometimes it only does it for a few seconds, sometimes i have to pull over and turn the car off. when it gets that bad, the car will not start again for a random ammount of time. when it finally does start, the tach no longer works... until i give it some gas... then it jumps back into action. sometimes after all this business, the car will just die out while at a stop light... no rough idle, just dies. i just read some stuff in my chilton's, and it might not be the eec, but the ignition control module? i'm really not sure, and i don't really have the money to take it down to a shop and say, "fix my car please". any help on this would be much appreciated. i've already had one sc in the garage for over a year, i really don't want to have this one in there as well.