Carbcivic

Question.. I got a chipped ecu , for 440 injectors, i start it up it wont go past 1500 rpms , once i let off the gas it shuts off. I contacted the ecu ppl they say my map sensor wiring is messed up.. i never touched the map sensor wiring when i did the motor swap.. anyone know how to wire up a map sensor?! the motor is a 99b16a bottom end, gsr head, ls throttle body.. the map sensor is on the throttle body.. im using my old plug yet for the map sensor that goes through the fire wall.. it was used with my old d15b7 non vtec.. i tried using the plug on the gsr harness but it wouldnt run right.. any ides on how to fix it? or wire it ?! thx