i just put a jdm b16 1st gen in a 92 hatch...im running a p28 but it inst chipped yet but for some reason its only revving to about 4k each gear then it hits what seems like a rev limiter....can anyone tell mewj\hat could cause this problem,im also throwing a #4 code which is the crank position sensor,i heard it could also be the map sensor please help