We never had nitrous before and recently put a single plate system on our car. We are just about ready to put nitrous in the bottle and try it out. We have an MSD 6AL ignition, and a MSD Timing retard control box (have set on 5 and 5 on first two dials = 10 total retard)., also have a NOS Mini 2 stage progressive controller that is hooked up but not programmed yet. It was our understanding that timing retard should not begin until the nitrous is activated. Is that correct? We started car up to double check the timing and it was already retarded by 10 deg. without the nitrous switch being activated. We put both dials back to zero until we find out what is going on. Shop that did the wiring suggested that we just buy a Delay box and they would redo it for free but i don't trust them to do anything else now. Any ideas what could be going on or what we need to change?