pcmhacking.net

So to use this I set the two red numbers in KHz to match the file say add 2% on where I need it hit calculate then copy the Hex data into the tune file?

I think I’ve got it. Awesome thanks for you help. It took me a bit to work out why my changes to the MAF data wasn’t showing up on the dyno.

It depends on your workflow but it'd be something like -> Log MAF Hz, target AFR, and wideband AFR. Figure out the % difference from target AFR and wideband AFR. Then copy your whole MAF table as the starting point in to the spread sheet. Then where you want to change fueling put a % change in the red cell against the HZ logged for that data point. When your done, hit recalculate table and copy the whole table back in to the bin from excel. write cal (safer than bin) with oseflash tool to put the changes back on the car.

Note though I have played around with these pcms i've never done this end to end. But I believe it works fine. There is also an injector multiplier table where you can adjust fuelling. Some people say use this table to tune and leave the MAF Hz alone. If you havnt changed the MAF, this might make more sense. I'll have to hand over to others and your judgement at this point though. Good luck with whichever method you use.

The method I’m using appears
To be working. I’m on the dyno now and it’s getting the desired results so far.