Thanks Greg for explaining why piggypacking the the signal wires of the sensors will not work. It makes sense, should have thought of that. All I need now is a copy of the Accel DFI Gen. 6 installation instuctions. If anyone could email me a copy it would be appreciated. Also, I do plan to upgrade from the 450cc injectors soon. I would like to get the DFI up and running now if I can. That way I have some time to tinker with it before I install a larger injector. I need to go get a book and do some studying before then so I at least know somewhat what I am doing. Thanks Dino for the link to the EMIC pdf but I already have one and I have read it. It doesn't answer any of the questions that I made in the previous post. That is unless I missed it. If I did then my appologies. Thanks again for the help.