ydb1992

Hi my name is mikey i need some help I have a microtech lt-8 with no internal map sensor all it has is a spot for a plug I'm wondering what that plug is for bc when I try and plug a external mapsensor to it it goes to max boost so if I put a 3 bar map it goes all the way up to 25 psi i need help im new to building cars and I want the car done right please. Help