ECU mapping and engine tuning

[1turbofocus]

I will let you know , so far looking like 2nd weekish of Dec

 

STFT1 = Short Turm Fuel Trim Bank 1

 

Tom

[1turbofocus]

Best Plug I have found is the Motorcraft SP463 Gapped at .055

 

Tom

[Tempesto]

On 11/27/2023 at 5:12 PM, JohnCh said:

 

Correct.  

 

 

No, you are changing the values in those cells. In the Emerald, + adds fuel or timing, and - removes fuel or timing.  To enable adaptive, you need to have values in the lower right section of the tab shown below under "Conditions that enable update of the corrections table".  

 

WOW, Been working on the car most of the morning, after the frost anyway, trying to reconcile everything I've learned and I would have never looked at it and wouldn't have known what I was looking at if you hadn't posted about setting the coolant temp. The "base tune" on my car the one with the cams advanced  and all that is set up for open loop because the coolant temp set at 120 like you said, does it come with a default temp. It would have never registered with me Im a farenheight guy and I don't know the trick. So I calibrated the 02 sensor loaded the old "base tune" I've been running for two years I drove it up my dirt road low speed and the car is back to normal I believe so road test tomorrow, too cold today. Is this common to have the tune "forced",don't know how else to describe, on the engine and not let it adjust to conditions?

[MV8]

They are not always correct and not a "fix all". There is more going on than how much 02 is in the pipe at any given moment. They can be dialed in but many have had a decent map, then used closed loop which quickly ran worse and worse with untimely feedback and/or under the wrong conditions. It can be made to work well. I'm sure Tom has all that covered.

[JohnCh]

17 hours ago, Tempesto said:

that is set up for open loop because the coolant temp set at 120 like you said, does it come with a default temp.

 

When you wish to run closed loop, set the temp to correspond with the lowest coolant temperature where injection corrections are set to 0.  Emerald typically sets this at 70C but no way of knowing if your injection corrections map was altered previously.  You'll find this on the "Inj correction" tab.

[Tempesto]

On 11/30/2023 at 8:51 AM, JohnCh said:

 

When you wish to run closed loop, set the temp to correspond with the lowest coolant temperature where injection corrections are set to 0.  Emerald typically sets this at 70C but no way of knowing if your injection corrections map was altered previously.  You'll find this on the "Inj correction" tab.

took the car and laptop out to try to data log, got an error from emerald Floating Point Division by zero I closed the error window set up logging but it didn't log anything over a 10 mile trip, what did I do wrong. 

 

[JohnCh]

Sorry, but I'm not familiar with that error message and can only speculate that it is seeing a data point used as the denominator in an algorithm as zero.  When the laptop is connected and the engine is running, is the Live adjustments screen showing data?  If yes, then I'd go over the Data Logger Guide on their site again to see if you missed a step or left a required field as blank.  I used the guide the first time I tried to log and it went smoothly and have never had an issue.  

[Tempesto]

5 minutes ago, JohnCh said:

Sorry, but I'm not familiar with that error message and can only speculate that it is seeing a data point used as the denominator in an algorithm as zero.  When the laptop is connected and the engine is running, is the Live adjustments screen showing data?  If yes, then I'd go over the Data Logger Guide on their site again to see if you missed a step or left a required field as blank.  I used the guide the first time I tried to log and it went smoothly and have never had an issue.  

Thanks, I'll go through it again. 

To be honest I'm getting tired of flailing around in the dark

[JohnCh]

4 minutes ago, Tempesto said:

To be honest I'm getting tired of flailing around in the dark

If that's true, then I strongly suggest you never consider building a new Caterham from a kit. It's all flailing, all of the time  

[NSXguy]

Apologies if i didn't catch the whole gist of the thread as i skimmed through it, but as i understand:

1-Car was running good (as in properly tune fuel and air models; if speed density, then your VE is spot on and you're running in close loop with minimal STFT corrections)? Typically in tuning lingo, Base file is typically just a start up file. should not be on a track on a base file. I assume the references in your thread may be down to semantics. 

2- At the track, you had an accident with your wideband o2 sensor, leading to you making a hardware change (new o2 sensor)

3- Since installing said hardware, engine hasn't run the same. No other hardware or software changes?

 

I'm not familiar with your specific tuning software, but generally, If the only change in configuration was hardware(new wideband), then the sequence would be, install hardware, reconfigure and recalibrate input in software, run car and verify your models are the same as before, make tweaks if necessary; rinse and repeat. Worth noting, if you tune/calibration is older and based on a different style wideband (say LSU 4.2 or other) and your new wideband is new style (say, LSU 4.9/LSU ADV) then you will definitely want to reconfigure; including controller if needed.  

 

Other tuning points. 

Generally you will initially tune in open loop, holding different variables constant or off (focusing on one element at a time), and once the model is good and stable, turn on closed loop and that should yield a pretty well manned running engine with mininal corrections in the background (STFT, LTFT etc).  If my assumption in point #1 is that your car was already tuned (and not a base start up map), then you should not really need to go back to open loop, you should already be running in closed loop and just make any necessary tweaks. But going back between open and closed loop is not an issue if you know what you are doing. 

 

[Tempesto]

6 minutes ago, NSXguy said:

Apologies if i didn't catch the whole gist of the thread as i skimmed through it, but as i understand:

1-Car was running good (as in properly tune fuel and air models; if speed density, then your VE is spot on and you're running in close loop with minimal STFT corrections)? Typically in tuning lingo, Base file is typically just a start up file. should not be on a track on a base file. I assume the references in your thread may be down to semantics. 

2- At the track, you had an accident with your wideband o2 sensor, leading to you making a hardware change (new o2 sensor)

3- Since installing said hardware, engine hasn't run the same. No other hardware or software changes?

 

I'm not familiar with your specific tuning software, but generally, If the only change in configuration was hardware(new wideband), then the sequence would be, install hardware, reconfigure and recalibrate input in software, run car and verify your models are the same as before, make tweaks if necessary; rinse and repeat. Worth noting, if you tune/calibration is older and based on a different style wideband (say LSU 4.2 or other) and your new wideband is new style (say, LSU 4.9/LSU ADV) then you will definitely want to reconfigure; including controller if needed.  

 

Other tuning points. 

Generally you will initially tune in open loop, holding different variables constant or off (focusing on one element at a time), and once the model is good and stable, turn on closed loop and that should yield a pretty well manned running engine with mininal corrections in the background (STFT, LTFT etc).  If my assumption in point #1 is that your car was already tuned (and not a base start up map), then you should not really need to go back to open loop, you should already be running in closed loop and just make any necessary tweaks. But going back between open and closed loop is not an issue if you know what you are doing. 

 

Yeah you did pretty good close enough to work with. 

I've been dealing with this directly for about 3 weeks off and on. The o2 sensor broke early this year and I tried once to look at the tune software attached to the ecu and decided I didn't know enough I went looking for a professional there isn't one in my area willing to work on my configuration. I was able to configure the new o2 sensor, both were LSU 4.9, and reconfigure the ecu and they are talking and I get live readings.

So I still don't know the "tuners lingo", and the key words of what you posted being if you know what you're doing.  I know it sounds like whining but logistically everytime I make a change I have to drive a mile of dirt road to get to a paved road to pull the engine though the gears to even try to do some software logging which is now having a problem with Windows and errors out. Your assumption in point 1 is correct I believe, someone advanced the cams that hopefully knew what they were doing.