i think iam having the same problem with my car, but my is from 3000 to 4000 rpm's and my car idles 1300 to 1500 rpm's use to be 750 to 850, and my air to fuel ratio use be 14.5 to 15ish at idle now its 12 to 13, and when i hit full boost of 15psi its at 10.9 use to be 11.3-11.5. so do i have a...