I dont really know what happened to it, but the truck wont even start anymore. It developed a short somehow behind the fusebox, and the dfi box ended up shorting out too. I opened it up and could smell the burnt wire that acts as a jumper wire, 1 of 2, which was soldered onto the solder side of the pc board, not the component side,had gotten pretty hot and melted into the board. I dont know if the damage is repairable or not, but i couldnt see any toasted resistors or anything obvious, but to answer your question, It simply will not start or run anymore.I have gotten it to almost start but when the rpm's reach the 300 mark,appx. where the ecu takes over, she dies.I was told that the white ign. pickup wire, c11, goes to the neg. side of the coil. I was also informed that if it is hooked up to the neg. side of the coil, and the est is also hooked up that it could damage the ecu?!? I cant find a home for the white c11 wire to hook up to, the ign. pickup with the 015013 config pinout.the truck is a 1991 gmc sierra, but has a 1998 454 BB in it, and has a pretty radical cam, headers, etc.the distributor has an external 4 wire coil plus the coil wire itself. Is there a way i can send the ecu to you and then let me know if it can be repaired? I dont know of anywhere in town to take it, or perhaps some tests i can do to it and give you the results? Anything will be appreciated greatly...THX. Bill