I give up I don't know what else to do. I finished my 3 month project about 2 weeks ago... twins, injectors,cross overs, o ringed head, totally swapped the complete wiring harness ecm, pcm, all sensors and VP pump and NV5600 along with the cluster from a wrecked 02 to my 98.5, the problem is when I start it the tach works for 7 seconds then goes dead and I get the code for cam sensor problem, I've tried both sensors and both vp pumps, checked all connections, ran the cluster through the diagnostic test and still no joy. I even tried the cluster from the 98.5, everything on both trucks worked perfectly before I started this project. I think when the tach isn't working it is also detuned as I can only pull 40 psi with the twins and 240 injectors and the juice on 6. If I shut the juice off I cant hit 20 psi and it is a pig. Oh and the tach on the edge attitude works fine. What am I missing? Help:banghead:please....