VersaTune User Forum

Thanks for your quick answer. It's an normal Injen CAI, no modifications or something like that. Basically I had this issue over a long time, even if had driven the car for a long period of time the STFT is quite high and the ltft is low. Do I something fundamental wrong? As I said the actual and desired AFR is close to each other. Over ~3,25V the LTFT is not recorded as I know, should the STFT also at zero because I'm Openloop?

It's possible that there's an air leak or some kind of lump in your maf table. Post a log using the MAF Cal preset and your tune or a screen shot of your MAF table.

Hi,

attached you will find the MAF numbers, Screenshot and the requested datalog. For sure, the calibration can be better, but I'm still focused to the high STFT.

I will search for some Air leaks again, but I tought I did it properly last time.

THX

The STFTs are higher only in open loop in your case, which is perfectly normal.

Can't believe... I'd checked some random logs from other guys and never saw such high STFT. Are you quite sure?

important detail that it only happens in open loop

Asthma wrote:Can't believe... I'd checked some random logs from other guys and never saw such high STFT. Are you quite sure?

I am quite sure... about 1475.325% sure. Or, wait!, 1475.327%!

Don't get me wrong, the internet is full of different statements and in my case I only wan't to make sure that's all fine. I'm very happy about your help.

Thank you

"Log using the MAF Calibration preset in VersaTuner’s virtual dashboard"
I cannot find this on the dashboard, is there a button I am missing?

What is your car?