Ok you guys have me hooked I have spent the last three days digesting this thread read almost every word and I am grateful for the mistakes you have saved me before I begin my experiment on my 2002 Dodge Durango 4.7L similar to Painless. I am more of the get er done type so to that end if I understand the thread correctly SmartScareCrow is selling some units that could get me started reasonably priced? If so how do i get one? Dont get me wrong Painless after reading your painless post I do not want to know what painful is like. My goal is to get up and running and be able to measure and post results. Perhaps my research will help painless with his pursuit and possibly others since I have the same engine. I hope the electronics are not as difficult.