Hello Oracle12345 and mac, I used pin# 3 and 2. Also I replaced temp sensor with no changes in duty cycle. Found I only needed to remove the one sensor connector that goes to the KE control unit on the two pin coolant temp sensor to get 70.6% duty cycle. Wires from temp sensor check ok to control unit (N3) and ezl unit 4 pin sensor connector. Will start easily if temp sensor unhooked and idle control valve removed from hoses. But must run at least 2000rpm or engine labors and stalls. Thanks.