$0D AE temperature difference tuning

**JeepsAndGuns** · 09-02-2013

OK, following my last thread, I am now having a problem with AE. When I changed my base timing to 0*, it helped a lot of things, but my AE suddenly became too little. It would go lean if I hit the gas. A little tuning/emulation got it back to where it should. However, when I adjusted it, the engine was already warmed up. Well yesterday I did a cold start and when the engine is cold and warming up, AE is flooding it. I'm talking like down to 10 to 1 AFR and boggs the engine. Once it gets warmed up, its fine. So apparently I need to adjust some type of a temperature compensation for AE, however I'm not sure what to adjust and by how much. I have found a few parameters, but the value is "factor" and I have no idea what that means, which way to adjust it and by how much. I figured I would ask before I start fooling around with them, as I only get one chance a day to try it. Just a reminder, I have a MAT installed.

I have found the following 3 parameters that I think may have something to do with it.
"AE correction factor Vs. temperature" (0x4B67)
"TPS difference AE correction factor Vs. MAT" (0x4B78)
"MAP difference AE correction factor Vs. temperature" (0x4B89)

Then possiably this one too:
"TPS difference AE coeffcient Vs. temperature" (0x4B5A)

So what is, or does "factor" mean, whats the best way to adjust it, and which way do I need to adjust it to take some AE out when cold?

**EagleMark** · 09-02-2013

May be a couple things if you have it dialed in warmed up.

"AE correction factor Vs. temperature" As you can see when engine is warm the factor is 1.0 meaning no adjustment, colder is multiplying. So can reduce here.

Another may be if it's still open loop? "AE Correction Factor vs. Temperature" changes AFR quit a be when cold.

**JeepsAndGuns** · 09-02-2013

So basicly you are saying that anything above 1, its adding more. I guess that makes sense, I just had no idea what "factor" was supposed to mean.
What about below 1? I'm guessing that would mean its taking some away?

**EagleMark** · 09-02-2013

Yup, 1.10 is 110% and .80 is 80%

**JeepsAndGuns** · 09-03-2013

OK, tried adjusting AE correction factor Vs temperature. Since it was going so rich, I adjusted all cells from 68*c and lower to 1.4, then all cells from 80*c and up to 1.0. This does not seem to have made any difference. So next up I guess I will try the tps and map tables.
Looking at the MAP difference AE correction factor Vs. temperature, its made kinda strange, as its 1.0 at 44*c, then starts to drop down to zero as temps go up. So if a factor of 1.0 is no correction, then what is a factor of 0.0?

**EagleMark** · 09-03-2013

Maybe 0.0 is no adjustment?

Strange the other was 1.0 in warmed up areas?

You still need to look at the Open Loop AFR table as it get's way rich with less vacuum.