I have 2 trucks I tuned. Both C10's one Gen3 and one Gen4 OS. Both trucks have Vintage Air A/C that is not linked into the pcm system. Both truck have Speartech harness and are show trucks so don't really want to go back and run new wires and back pin into the pcm. Is there a way to tune around this to help fix the Idle surge/drop when a/c engaged without the PCM knowing there is an a/c system just engaged? I asked on the facebook page and everyone just said wire it in to the pcm..