illusive

Ok I just recently boosted the D15B7 with the 92-95 civic greddy kit. I was running the emanage on my car to start out with since it was sent with the kit, the shop that helped me with the kit wideband o2 tunned my car but we couldnt get any adjustments out of the ***** and it was throwing codes on the emanage and was messing up so we trashed it. Next we installed a SAFC and missing link.......well we still ended up with map code when it seen positive pressure.....very confused we checked everything worked just fine.......I tried check valves while I was waiting for my missing link that was on backorder and still would throw codes and I used 4 of them. we then tried a OBD1 LS ecu and it finally took away our MAP code, now can someone please explain to me why the stock dx ecu would throw a code and the LS ecu wont?