I don't want to start a big technical discussion here, because I wouldn't understand it,,, but is there an easy way to describe just unhooking the ground wires effect? On '07 and later models,we disconnect our O2 sensors and the TFI plugs into the 02 circuit (thereby doing some kind of electrical magic to confuse/overide the ECM's 02 signal input). If you disconnect the TFI's ground wire, but leave it in the system, isn't there some "need" for input to the ecm's 02 circuit?
Will a trouble code show, or is the 02 input really not a necessity? I really like my TFI, I just want to understand this tiny bit about it.
Type slow, I don't understand a lot about this. :newsmile030: