I have intermittent P0171/P0174 Codes. Lean bank 1,2.

What is your question?

Check Engine light comes on/off periodically. Had a real dirty air filter. Replaced and light went out. Came on again. Cleaned MAF and light went out. Came on again. Now out again for a hundred miles or so. Car is running good. Plenty of power and good gas mileage but rough idle on cold start. Any ideas?