ECMlink fails to perform “MAFComp Adjust (CombinedFT)” after a cruise?

[aPOS]

I was watching a colleague work with his ECMlink, and the person could not get the “MAFComp Adjustment (CombinedFT)” function to provide a new Template after a cruise in Closed Loop. The Template would always be exactly the same as the initial “base” settings (0% across the Template above 50 Hz) after logging some cruises. Neither of us are very experienced with ECMlink.

Now, I have frequently witnessed other’s adjust DSMlink V2, but I have no experience with ECMlink’s additional features. My colleague does not have a DSMtuners account, meaning that I am inquiring. Similarly, I enjoy learning more about it.

To the best of my memory, I noticed these settings and events:
1. RPM Target idle at “850” (car idles around there since he has 272 cams in a “stock” 16g at 18 psi TSi)
2. TPSVolts at idle was adjusted to “0.63v” using TPS Offset
3. Global Fuel and Deadtime at “0” (stock injectors)
4. AirFlowPerRev at idle was adjusted to 0.26 gm/rev using (lowering) the MAF Comp Adj % sliders at 50 Hz
5. Base MAF type at “Stock” (I only glanced at this, but I do not think it was incorrectly at “Speed Density“)
6. MAFComp, above 50 Hz, all at “0%“, yet there is a box checked reading “Disable airflow smoothing w/ SD operation” (since the car is not using SD, this could be the problem)
7. During the cruises, the “Lock in open loop mode” box was checked
8. During the cruises, the “Disable airflow smoothing w/ SD operation” box was apparently checked (like the attachment below illustrates, yet nothing except “Lock in open loop mode” and “Disable airflow smoothing w/ SD operation” were checked)
lockecmlinkmode [ECMTuning - wiki]
9. The “Lock in open loop mode” box was unchecked after the cruises were completed.

I did not want to suggest/perform changing settings that I have no prior experience, or understanding about, in regard to its effect. So, even if my guess about the “Disable airflow smoothing w/ SD operation” being checked is part of the problem, I had not wanted to change it on my colleague’s car. Plus, I had not known why it was (or who) checked the box in the first place.

 

[snowborder714]

I was watching a colleague work with his ECMlink, and the person could not get the "MAFComp Adjustment (CombinedFT)" function to provide a new Template after a cruise in Closed Loop.

7. During the cruises, the "Lock in open loop mode" box was checked
8. During the cruises, the "Disable airflow smoothing w/ SD operation" box was apparently checked (like the attachment below illustrates, yet nothing except "Lock in open loop mode" and "Disable airflow smoothing w/ SD operation" were checked)
lockecmlinkmode [ECMTuning - wiki]
9. The "Lock in open loop mode" box was unchecked after the cruises were completed.

Not sure how you did a cruise in closed loop with the "Lock in open loop" box checked.


v3mafadjcombft [ECMTuning - wiki]

The MAFComp Adjust (CombinedFT) menu item is one of several tools you can use to help "dial in" your airflow settings. This particular item maps out and averages CombinedFT over a range of closed loop driving conditions to produce a set of adjustments to the current MAF compensation table.

STEP 2: Check For Closed Loop Operation

Make sure the car is able to run in closed loop mode.

It needs to be in closed loop to work.



If your colleague is running SD, the "Disable airflow smoothing" box should be checked.

 

[dirtysouthpinoy]

Make sure you are logging the required items to perform the MAFcomp auto adjust feature. It shows you step by step in this video.

http://www.ecmtuning.com/demos/fueltrim.html

post the log here and let me see. maybe the car is stuck in open loop mode or your O2 sensor is bad.

 

[snowborder714]

The OP already mentioned that they had the "Lock in open loop" checkbox checked

 

[aPOS]

Not sure how you did a cruise in closed loop with the "Lock in open loop" box checked.
It needs to be in closed loop to work.
If your colleague is running SD, the "Disable airflow smoothing" box should be checked.

Thank you for your explanations. I had gotten very confused!

ECMlink has so many features beyond V2.

I read the v3mafadjcombft [ECMTuning - wiki] (as provided above), and I viewed Demo #8 (as mentioned above), along with #1 - #7, a while ago. I should have watched it again more recently, because I confused seeing/remembering the “Lock in open loop mode” box being checked with wanting the box unchecked (as explained later in the Demo #8).

I know my colleague’s TSi is not Speed Density. Does the “Disable airflow smoothing w/ SD operation” box need to be left unchecked for the MAFComp Adjust feature to work, after making certain the “Lock in open loop mode” box is not checked? Does it matter whether this box is checked at all, or is it best to leave this box unchecked when having a MAF type of stock? Possibly, other ECU functions would be adversely affected by having this box checked.

Coincidentally, what would be the benefit of checking the “Lock in open loop mode” box?

 

[snowborder714]

Lock in open loop mode
Check this box to permanently lock the ECU in open loop mode.  There are a few situations where this might be useful.  First, if you're really desperate to free up one more ECU input, you can choose to lock the ECU in open loop mode so that it will ignore the front O2 input value.  Once that's done, you can connect your aftermarket sensor to the ECU's front O2 input.  This isn't a recommended configuration, though.  The other situation might be to help dial in a MAF sensor.  You can lock the ECU in open loop mode and then more easily compare estimated A/F ratio to measured under light acceleration conditions.  Both of these, however, are unusual situations and should not generally be used.

Disable airflow smoothing w/SD operation
Normally the ECU smoothes the raw airflow reading obtained from a MAF sensor.  Such smoothing is usually undesirable when running SD because the smoothing can unacceptably delay the ECU's response to sudden airflow changes.  This checkbox is checked by default.  In the unusual case where raw airflow smoothing is needed during SD operation, uncheck this box and adjust the smoothing parameters via the direct-access AirflowSmoothing table.


Both of these descriptions were found by clicking the ? icon in the bottom right hand corner while viewing the Misc tab in ECMlink. Each screen has that question mark which will lead you to the help file. Also, if you hover over an item, most of the time a little box will pop up with a short description.

The smoothing checkbox shouldn't matter since you don't have Speed Density selected on your MAF Comp tab.

 

[aPOS]

Post the log here and let me see.

The smoothing checkbox shouldn't matter since you don't have Speed Density selected on your MAF Comp tab.

Again, thank you for your detailed explanation.

Sorry for my lack of finding the definitions that you kindly provided, I do not have DSMlink (or ECMlink). I have witnessed others using the program/device to learn about it, and I intend to transcribe better notes in the future. I do have access to the Knowledge Base/Wiki and the Demos (like anyone would have), meaning that I should have realized my foolish mistakes, especially concerning Closed Loop and Open Loop.

I shall inform my colleague about the setting changes, and the recommendations, that all of you have furnished. In the future, I can also get a copy of some current logs during a cruise (and/or at idle) in case additional confusion occurs. Regretfully, I presently have no copies of any logs for review.

My colleague owes me for doing this favor, and as a result having me portrayed as an imbecile.

 

[snowborder714]

You are free to download the software from their site and play with it all you want. You can browse the forums here (specifically the Log Advice sub-forum) and open logs and look through them. This is a good way to become familiar with the software.
ECMTuning, Inc.

 

[aPOS]

Wow, a free download to play, and learn from, is quite generous. I had no idea ECMTuning offered their program to anyone (that did not purchase DSMlink/ECMlink).

I have not searched extensively on the sub-forum that was mentioned, yet I reviewed the Demos, and the Wiki, to determine what I must be missing. Concerning the TSi's ISCPosition at idle, even after adjusting the BISS counter-clockwise (out) incrementally, I recall the ISCPosition would not go below 39 (to reach the desired 30). After adjusting the BISS all the way to 5 full turns, the TSi stalled before the ISCPosition moved below 39 (it stopped changing at 3 1/2 turns out). As mentioned above, the RPM Target, TPSVolts, and AirFlowPerRev reacted as expected, when adjusted, to result in accepted numbers. Although the TSi idled steadily around 900 RPMs (BISS at about 3 turns out), the ISC tested operational, the ECU/ECMlink was new (burned driver chips are doubtful), and the Idle Switch worked properly, the ISCPosition would not reach 30. Allegedly, the TSi had been recently checked for boost leaks. What are we missing?