HI, after you did your 3000 and the 91 did you need to use the e12-05? Did you just unplug the ecu "e12-05" and throw it away? The reason I am asking is I am having the same problem, It won't fire while I try starting it, but sits there and sparks while the key is on???? so I would like to know after you did what you did what do I do with the plug where the ecu pluge in?? Thanks, Sonny