i have an 87 gn with the basic mods i just got done replacing cam lifters timing set injectors and chip and now im getting code 45 its running rich at idle and not stable at all on the air / fuel gauge i took it down road it does ok till under boost at about 7 lbs of boost at 25-2800 rpm it will pop and spit and max,s gauge on rich this is my first gn if im right code 45 is a o2 code thanks for any input need all the knowledge i can find out on this