VersaTune User Forum

Have a 2007 3 MPS, Been tuning it with versatuner, its got a corksport intake, autotech hpfp, forge bpv and a test pipe.
Did logs yesterday and AFR Actual was pretty much spot on Commanded.

Today flashed a new map, with no change to afr or maf cal.

And my afr is lean. for the whole WOT run the actual afr was 0.5 -0.6 leaner than commanded afr.

Been using this maf cal for months, the car had done 100 + miles on the map before the logs were taken.

LTFT at idle is < 2
Stft at idle is < 5

Logs attached, any help appreciated

You're knocking quite a bit at WOT, close or above the danger threshold. For some reason the knock AFR tables are leaner for our cars than the normal AFR tables. Maybe the culprit is there.
Other than that there may be a post-MAF leak, some gas very rich in oxygen (too much ethanol, too many additives containing other stuff rich in oxygen, and so on).

So go back to the advance timing tables you've had with the last tune and watch for knock after you reflash.

The only difference between the maps is the BCDS table was slightly tweaked. It was running different fuel, the second log would of been on 97 Ron fuel as I couldn't get 99Ron, the first logs were 99Ron. Thats the only change between the logs.
Ltfts at idle are less than -2?

It's only knocking due to it running lean, Tim had a solid tune dialled in and was seeing no more than .35 and most of the time zero kr. I'm thinking a leak at the turbo inlet.