I've done all of those checks. I don't hear any clicks when diss-connecting or re-connecting the AAC connector. I did wire 12 volts directly to it while it was installed on the engine and the idle raised a few hundred rpm's. The efi harness is fairly new(~5k miles) and I did check continuity between the non voltage side of the connector and pin 4 of the ecu connector. Ecu connector looks fine. I sent you an email about it with more details a few weeks ago. Did you get it? Thanks for your help.