Ibarra_sb

my name is jose and i just got a 1989 rx7 n/a completely stock. I'm 18 and this is my first car so I'm pretty new to rotaries but my dad is a mechanic. the engine was rebuilt by my dad(first rotary ever worked on but did a great job) as soon as getting the car and it runs great except it doesn't pass smog. the smog guy said the engine was getting to much air from a vacuum sensor or something. i wasn't there so I'm not sure exactly what he said but i need to know how i can fix this. will i need to buy new sensors or maybe my wiring is off? anyone can help me i can post a pic of my engine if it will help?