use dhp to scan maf frequency, FT cell, and LTFT save the log. export as .CSV file. open in excel. filter data by FT cell. delete all lines with FTcell 3. paste data and your current maf table into the excel sheet and flash new maf curve to computer. reset fuel trims and repeat. when you log dont go into PE. get as high as you can into the MAF table hertz wise but dont get into PE. drive should be 30-40 minutes and should yield 10,000+ lines of data. maybe. its been a long time since i have done it this way since i have HPtuners now.