Idle log (basic set up)

[red_devil]

Just started messing with link. Looking at my idle log it looks like my o2 is shot correct?

Also I know AEM UEGO tend to have a accuracy issue but its reading around 14.0.1 on the log but in the car its reading 15.2.1??

edit sorry meant to post in log advice section

 

[snowborder714]

I'm not sure what's up with the narrowband. I don't think I've ever seen one kind of cycle but not really. Usually if they're dead, they're dead, and they read very close to 0v. Might be worth a try to swap in a working one.

Here's more info on the AEM.
aemwb [ECMTuning - wiki]

 

[red_devil]

Thanks, I logged it on another setting and now its working. Still having front o2 issues. So I guess I will order a new one.

How does my idle look now.

 

[snowborder714]

Add ISCPosition and Battery to your logged values.

It looks good other than your wideband is reading leaner than your AFRatioEst value.

 

[nicknorth11]

These are the basics of getting a good idle: (Taken from the DSMLink Tuning Guide in the tech section)
http://www.dsmtuners.com/forums/articles-tuning-ecu/262460-basic-dsmlink-tuning-guide.html

A/F Ratio (closed loop) 14.7
(open loop) 11

AirFlow (compare to specific turbo output)

AirFlowPerRev (at idle) M/T = .27 10% (.24 - .30)
A/T (neutral) = same as M/T
(drive) = .31 10% (.28 - .34)

CoolTmp x>179°, sufficient operating temp. to tune
if: x<206&#176;, full timing
206&#176;<x<224&#176;, -1&#176;
x>224&#176;, -2&#176;

IdleSw (car off / ecu on) 1

IntTemp 34&#176;<x<84

ISCPosition 30 (at idle)

LearnedIdleAdj 140 (at idle)

LTFT Lo x&#8594;0, (0 5)

LTFT Mid x&#8594;o, (0 5)

Front02 cycles around .5 (.05-.95)

RawThrotPos 32

ThrotPos if: idle, 0
WOT, 100

TPSvolts .63 (when RawThrotPos = 32 and ThrotPos = 0)

 

[red_devil]

Add ISCPosition and Battery to your logged values.

It looks good other than your wideband is reading leaner than your AFRatioEst value.

Ok I'll do another tomorrow. Would my front 02 issues be causing the wideband and AFRatioEst differences?

 

[snowborder714]

It's a very good chance. I won't say "that looks great, time to move on" until you get a good cycling front o2

 

[nicknorth11]

The difference between what is being displayed by the two sources (AFRatioEst and your wideband) isn't what is causing your front 02 to not cycle. First, trust your wideband's own display. The issues with Link are only with what is displayed on the log as compared to the actual reading (as displayed on it's own gauge face). Second, the AFRatioEst on Link needs to be set up properly to be accurate, (unless you have recently updated your firmware on your ECU, in which case this is now done automatically).

There are several requirements that have to be met before your front 02 will cycle. The one that sticks out to me is the only one we can't see in your log, fuel trims. They have to be within a given range, IIRC it's around 0% (plus or minus 5%).

So, let your car warm up to operating temp and take a log, including fuel trims. (I always log all of these: LTFT Lo, LTFT Mid, and CombinedFT). If they're more or less than 5%, there's your problem (or at least one of them). In this case, read up on how to adjust them and report back the results once you've gotten them within range.

 

[red_devil]

Replaced my 02 sensor and its cycling better but it still doesnt look right. My WB is still leaner than my AFRatioEst.

I know my LTFT is above 0% and I need to fix that, I have to be at work in 5 mins but would this be the issue?

 

[snowborder714]

Is that observation just from the log, or also in comparison to your gauge display? As has been noted before, the AEM gauge is not easy or great to log in link, and often times poses a problem getting things to match up.

I notice that you have a coolant offset of 20. What temp does your car get to fully warmed up without the offset? If above 180, then why do you have the offset?

Try getting your fuel trims in check and see if that changes anything.
http://www.ecmtuning.com/demos/fueltrim.html

 

[red_devil]

Wow thanks I forgot to move the offset. I was having cooling issues before but now they are fixed so i will change that. Looking at my WB gauge display it is closer to the AFRatioEst maybe .2 or .3 leaner not the whole 1.3 that is being logged. I bought the AEM before researching it a few years ago and I liked the guage size. Now I wish I had a LC-1 or the MTXL, and probably will get one soon.

Anyway I played with it a bit more and its much better.

 

[red_devil]

Did another idle and a cruise log

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And my idle after messing with the MAFcompadjust

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Any input would be appreciated.