could the decel cut off be at fault, i`m guessing it could be disconnected whilst on your driveway, its simply a means of killing the engine and shutting down fuel pump in the event of an accident, that was my understanding of it, thats what the speed sensing relay was for, i think , , also i have 1 here from a 1983 xr3i it ends in 113, part number 83AB 12B 528-AB