First time tuning. I have a lean idle, but every time I try to richen it up I can see my LTFT?s start pulling more fuel out and my AFR goes back to lean again. I keep trying to richen it up and the computer keeps pulling fuel out. What am I doing wrong? I?m using an AEM 30-4110 AFR gauge for data logging. Ltft are now -20 with afr 16-17. When I started AFR was about the same with ltft negative single digits.