sd/ol tuned warm up going lean after about 145 degress

[Stealthy93]

Is there anyway to filter out off throttle decel data. I have dfco turned on but it takes a bit before it stops reading and I have lean spikes

[Cringer]

Is there anyway to filter out off throttle decel data. I have dfco turned on but it takes a bit before it stops reading and I have lean spikes

I will typically use this with my other filters...

and [50091.156]>1

[Stealthy93]

Thanks bro I will try it, I see you on YouTube about a year ago and used your vve assistant good work brother. Also have one of your filters now but doesn?t seem to work with o2 will try the filter in post thanks again

[Stealthy93]

I?ve started over 2x times with the vve table and I did with o2 on and map only and at idle I always end with a dip but notice if I smooth the dip out the car drives extremely smooth but if I put the the vve where it wants at idle the car bucks and jerks in a lug situation or from a stop. I notice it has a lean spike from transition from idle to moving and off idle rev. So I think im running rich at idle for some reason causing the vve table to dip as show when I run the error correction. Does anyone know what could cause this maybe leaky injectors?

[Stealthy93]

Bump

[edcmat-l1]

Where's the most current tune file iteration and a corresponding data log showing the problem you're describing? Don't tell me what it's doing, show me.

[STAGEUP]

Logging dynamic airflow and VE is key. Getting them as close as possible is also key. ;-)

[Stealthy93]

new slate tune.hpt 25-02-04 19-35-13.hpl

just started this tune over for 3rd time chasing idle issue then notice idle is abnormally rich which causes bad dip in vve table

[LS ROB]

Add Volumetric Efficiency to your channels.

[Stealthy93]

Alright I added the pid anything in particular I?m looking for, am I trying to get it to Mach dynamic airflow and how do I do that. Right now I?m running a wide and error set up

[Stealthy93]

i dont see anyway for the 2 to match up they are so unalike i dont think they are measured on the same scale

[Cringer]

I trying to get it to Mach dynamic airflow and how do I do that.

https://youtu.be/xRZaTblSQ_0

Right now I?m running a wide and error set up

Don't do that. This is not 1999. Use your narrowbands in closed loop.
Use your wideband for openloop/PE tuning only.

[Stealthy93]

Ok so use my narrowbands to tune closed loop.
And use wide bands to tune open loop/pe.
Right now I?m open loop speed density with wide band is there something wrong with that. I do want the closed loop tune done right, but I have tried narrow bands wide band and corresponding both and can not find the reason why I?m rich at idle. Also some times it?ll go lean for a bit than pig rich again it?s never consistent.

[Stealthy93]

I added the tune file and a log, I?m thinking it?s not a tuning problem I?m thinking there maybe something mechanical like a leaky injector or vacuum leak any ideas, it?s only at idle. About a year ago edcmat-l1 pointed out the dip and I?ve been trying everything to remedy it. Is there any way to find injector leak or vacuum leak on pods in log or just pull them and have them tested

[ns158sl]

Some people are anti Wideband, and they are not wrong. Sometimes Wideband will get you close to the target quicker. But you will always want to tighten up the airflow model with the narrow band feedback. At the end of the day, the narrow bands are going to push the trims where they want anyways.

Need a tune and a log with maybe timestamps with what you are talking about, and then we can help you out. Again my guess it is going in and out of CL/OL and are having fueling swings.

If your WB is disagreeing with your NB's by a lot, something is wrong. It could be an exhaust leak/vacuum leak/shitty NB/shitty WB/ un-calibrated WB/ etc.

[Stealthy93]

I have a tune file I posted yesterday about 6 post up where the vve table at around 800rpm and 67.5 map the table wants less than 1.000 there the areas around that are like 1.200 and hight which cause a massive dip/ valley there but idle fueling says it?s good maybe a lil rich.

I?ll do what you said here in a little bit and I will get it posted up thank y?all

Also when it is idling and the Wideband says it?s stoich it idles very well makes me think the readings are right or very close

[Cringer]

The car was not in SD as the MAF was not failed. The attached tune will fail the MAF properly. Additional changes I have made to the tune will help eliminate variables with fueling, but I have not changed MAF or VVE. Your VVE shape is really a problematic though, so expect some issues.

As I mentioned before you should enable CL and use fuel trims to tune. Also, OL/SD tuning is not great IMHO. It is the year 2025 and there are much better options. Assuming you take my advice, you should also disable LTFT and run STFT only. If you want to enable LTFT in the future that is fine, but for now, it will introduce issues (or at least cause you the extra step of resetting them each time you flash a new tune -- so best to disable them for tuning purposes). In short, you need to tune the ECM in the environment for which it was designed to run: closed loop with MAF and VVE.

Also, you need to add Virtual Volumetric Efficiency mass flow rate (g/s) to the logfile.
You can also log Mass Airflow Sensor State to tell you if it is failed properly.

If you insist on using SD/OL tuning, use this going forward.
new slate tune - cringer.hpt

[Stealthy93]

idle and surge issue.hpl idle issue 04:06:01-end of log

ok the main issue is the idle issue idk how to time stamp but idle issue happens time: 04:06:01-end of log
the idle will start lean which is what i would expect because of the dip but it still goes rich which i feel is a possible injector issue or something what do yall think

i am going to get the closed loop sorted out but the reason im hear is because in closed loop there is a hard buck at low rpm start off and i think i narrowed it to the idle cells



Screenshot (2) idle issue.jpgScreenshot (1) idle issue.pngScreenshot (3).png

thankyou cringer for the failing the maf i looked it over i only had the p102 low failed and now i know to log maf state thats awesome. but here are the pics and logs of the issue

[Cringer]

idle and surge issue.hpl idle issue 04:06:01-end of log

ok the main issue is the idle issue idk how to time stamp but idle issue happens time: 04:06:01-end of log
the idle will start lean which is what i would expect because of the dip but it still goes rich which i feel is a possible injector issue or something what do yall think

i am going to get the closed loop sorted out but the reason im hear is because in closed loop there is a hard buck at low rpm start off and i think i narrowed it to the idle cells



Screenshot (2) idle issue.jpgScreenshot (1) idle issue.pngScreenshot (3).png

thankyou cringer for the failing the maf i looked it over i only had the p102 low failed and now i know to log maf state thats awesome. but here are the pics and logs of the issue

I don't know how else to tell you -- you are in OLSD and complaining about a fueling issue when your VVE is a mess -- the simple answer is to tune your VVE.
I also don't know how else to tell you to go to CL and enable your MAF to finish the tune.

Either way, here are two files to help you out.
One has VVE changes only.
The other has extra idle stuff to help tame surging.

HAVE YOU CONSIDERED THAT A MAJOR PART OF YOUR PROBLEM IS THAT YOUR MAP SENSOR DATA IS SET TO ZERO?! Put the proper data in your slope and offset fields.
[ECM] 4112
[ECM] 4113

[Stealthy93]

Thank you for that you are correct definitely idles better and seems to be more tame to drive with idle tune you sent.

I did not know my map sensor data was an issue as I left that factory and cross checked it with 2 other factory tunes. So I never had anything to go by. How would I correct this issue I don?t know any data to put there