I just got this utec a week or so ago (no tuner yet so no afr data) - the first night i installed it car started, ran fine and i did some logging on the drive home. when i got home i noticed this wierd number that kept showing up in the mod maf column randomly (3392). I didnt really think much of it, and i did some more logging throughout the week and didnt notice it again. I started getting a little misfire due to older bpr7es's so i replaced them last night. Now the wierd number is back, along with another (9464...yes nine THOUSAND). I cannot find any pattern to this seems to be very random - when it shows up my maf reading is fine, not jumpy at all. Please take a look at the attached log and advise - sorry the logs are stop and go traffic on my way to work, i tried to get a couple WOT spots in -notice the maf only goes as high as 1600hz then

- thanks

my mods are buschur cat back, turbo xs mbc set for 19psi (settles to 18), cone style intake mounted on maf, greddy type-s

 

by looking at your mods I would suggest you change back your stock AirBox and see if the problem goes away. Evo with Aftermarket Air Filter and Pipes are sometimes troublesome

 

It seems that the number shows up right before a slight decrease in idle. I can't really explaine why though. Just a pattern I noticed

Ben