holy smokes, thought i was grasping things but now I feel I am getting lost..I read the links you posted, starting from ¨how to tune a GM EFI System¨ & working my way down. I can see right now I will have to read the How to tune GM EFI again (3rd time) and refrence it later..good info. As far as the Wide band- I am trying to figure out how to set it up to the ECM or is that what the How to data log AFR with APU1 does? I hear people saying to ¨tie¨ it into the ECM or something like that, but, havent figured that out yet, so, basically I need to understand how to set one up then from what I grasp follow the ¨datalog AFR with APU1¨ link to a T ( 0 volts at 10 & 5 volts at 20, etc, etc) thank your for your help and patience.
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