MAF Cal confusion

[omgheyitskenny]

So I am following Abilor's guide and after I did 3 logs from 2k RPM my numbers are so far off from examples and now I am confused if I did something wrong? Did I indeed mess up while doing my log or no?

The long term, Maf volt, and MAF Airflow

[MS3inDC]

it looks like you are making adjustments in the wrong direction. Your STFTs get worse with every log in virutally every break of your g/s. are you sure you are calculating your adjustments correctly?

MAF cal is a tedious process, I know. But misplacing a decimal or +/- will throw off your calcuated adjustments

[omgheyitskenny]

I have not adjusted anything yet this is still OTS stage 1. This is why I am confused since it looks so wrong on the logs from each log and I did not do anything different in each one....

[dantes5823]

Did you flash it and went straight into a maf cal? Drive it around for a bit then try it again. I did a maf cal for one of my guys and he logged i think the next day and his first wot log was all sorts of fucked up. Then after that it was on point. Did another maf cal the next day and all were within 3%

[Deldran]

^ what he said, if you just flashed it. it takes time for it to learn

[MS3inDC]

Have you allowed your car to learn the newly flashed trims?

Your ecu is very smart and constantly making adjustments. If you took these logs immediately after a flash, then your ecu is still "learning", which may explain the varied results

If you haven't made any adjustments, focus on getting cleaner logs for now. Your g/s jumps a lot in your logs. The cleaner log you have, the easier the process is.

[omgheyitskenny]

it has been on OTS flash since 1000+ miles ago

[MS3inDC]

Originally Posted by omgheyitskenny it has been on OTS flash since 1000+ miles ago

That being said, your ecu is "just doin it's thang".

If you haven't touched your tables... get some clean logs and have at it. Don't be scured!

[Keko]

The Logs look OK. Few things you need to do.

1. Start the log at about 1500 RPM so you can better see the LTFT <6g/s
2. Accelerate a little bit faster. Start out the same but once you get to 3k RPMs or so start slowly accelerate faster. You want to get to 100-130 g/s. In these logs you are barely hitting 100+g/s and you are ringing the engine out to 6600 RPMs or so, no need. You just need to stay in closed loop its not that hard.

Your breakpoints look fine. I did my first MAF cal a few days ago, and it looked just like this. All the guides I read had more breakpoints than mine, so I was also confused as hell. I poked around and realized my map (Stage1+Aeros SRI OTS map) only had breakpoints at 5.7g/s, 18g/s. After 18g/s it will stay the same unless you change the breakpoints.

I calibrated my MAF from 0-5.6, 5.7-18, 18.1+ with the logs I had.

After I did that, I added new breakpoints in the map. I forgot where they were and I don't have ATR here. I forgot what I set my breakpoints to, but now it's more accurate. I actually ended up calibrating it well, I will fine tune it once I get more miles on it, and I will have more breakpoints to work with to make it more accurate.

[86AmishMs3]

Everything looks fine...for the first few breakpoints after the first you could add 2% but really it doesn't look like it needs touched

And btw 3rg gear works better.

[omgheyitskenny]

Alright thanks guys will attempt again after lunch

[Boost_creep]

Keep in mind Abilor's guide is a bit outdated.

Cobb's new OTS breakpoints are:

0-5.7
5.7-18
18-full sensor range

[TriO]

Looks pretty good to me.... Closer than mine are anyway