So my car is acting lean with fluctuating idle plus after doing multiple drive cycles will intermittently through a P0171. Smoke tested and found no vacuum leak. My stft is around 20%, but my ltft never leaves 0%. Load is 38% at idle with no load and 48% with AC on. Also, seems to run better with AC on. Also, while driving my cat monitor O2 sensor will only show .05-.1. Intermittently at idle will increase around .5-.7. New O2 sensors front and rear. Fuel pressure 60psi. Has anyone seen this or knows of a reason ltft will not adjust from 0%?