Alright, sorry mods if this isnt the right place to put this. Feel free to move it. I have posted this before but I have new develpments. So ive been throwing the P0171 code (or mabey it was P0172, whichever is lean) and my first suspicion was the vacume lines. So i changed all 4 to silicon. The light comes back on so next on my list of things to do was clean the mass airflow sensor. Unfortunatly, my light just came back on (and if it matters, both times it came back on was just after hard acceration). So my question is am i missing anything before I buy a new mass air flow sensor. I just purchased a vagcom cable and am expecting it tmrw or monday. Any tips on what to check would be great. Am I forgeting any vacume lines? (my suspicion is its a vacume leak because it comes on after hard accelration).