I tried to email the diagram to you, but the send failed. I suspect the file attachment size is too large at 1.7mb, because it grew by about 100% when I converted it to jpeg. I'll try to zip.exe it and send again. I get dizzy trying to trace out the various vac states at various thermo vac valve states. Starion system is MUCH simpler - it only makes me sea sick. Once you trace through it, it seems that 90% of the functions accomplished are to stop egr flow at idle and when the engine's cold. I prefer tapping the egr valve inlet port or preferrably at the exhaust port side to avoid additional head heating) and damming it up with a dang plug.... If I only had a TIG welder (and knew how to use it)!