How do I calibrate the maf, if I have a map sensor as well. I have VE airflow. I don't have the option in hp tuner for dynamic airflow or idle airflow either. I got a cold air intake system installed now, but my car is burning more fuel now, rather than saving fuel like it's supposed to do. I'm not quite sure how to work with the histograms in the scanner. Someone told me to log dynamic airflow in the MAF hz histogram, but I don't have a dynamic airflow pid. If you want to look at my tuner file to see what I need to do, be my guest. I added it as an attachment. Please help. I've been stuck on this issue for a week now.