I really appreciate the quick response I have ohm'd from pins to inj and narrowed this out. I do believe the short is in the ECM. I would love to know a way to pinpoint this 100%. Is there anything else could cause the running rich smoke? From thr original car/engine I have used the ecm,egr valve, MAF o2 sensors, an dtemp and fan relay sensors. Is there any of these that could be the culprit? I am almost ready to spend the 200+ dollars to buy the ECM but really would like a little more input. Once bought the ecm is non returnable.