Advice please, am I too fussy ?

I have been trying to dial in the maf as I made some modifications to my car. I am using lambda error with my wideband to do it. I log, copy, paste, etc, etc following the methods discussed here on the forums.
My question is this... I do logs for abought 5 -7 minutes covering rpms up to 4000, and then paste the percent error. I now have it to the point where I am under 2% average in all the maf cells. Whats bugging me is that although I am satisifed with that average error, when I watch the log it runs from about 10% lean to 10% rich in various places.
Should i ignore this and just be satisfied with the average of a 5 - 7 minute drive, or should it be a tighter range throughout ? I notice that when i do a copy/paste and then start to log again, it idles rich on startup for the first minute or 2 and then idles right on commanded from then on. Normal ??

Thanks for any advice. This is bugging me but maybe its the norm.

A MAF is an imperfect piece of hardware. It happens.

it's going to vary since the road varies, the wind varies, fuel varies, etc etc. that's why you use an average over time to tune it. if you look at one snapshot at a point in time, who knows what you will see. when you stare at the computer logging and see wild swings, your mind is only seeing brief snapshots and trying to process them. this is misleading.

Yep, average calculated days is the way to get it set to where you want to be. And remember, the computer can only think so fast. Which is why a tune, as good as it can be, will never be perfect.

Thanks guys. I feel better about my tuning abilities now that 3 experts have chimed in.

:yay: