My car stutters...

[DSM_421]

Easy way to tell if your ecu is eprom or not is to see if it has an E on the outside of the casing.

However, that doesn't always mean it is eprom, in the 1gs sometimes it will have a eprom case with a non eprom ecu inside. If you can pull it out and open it, you will notice a chip on the bottom right hand corner of the board, that means you have an eprom.