WannabeCupra
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« on: October 18, 2024, 03:52:12 AM »
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I am troubleshooting some timing oscillations on my Leon 1,8t.
Hardware is stock, just fixed up all the issues it had. New MAF, new Lambdaprobe, new Fuelpump and FPR, new PCV System. Car runs good and strong stock, now I tried my hand on wideband conversion plus Stage1.
Turned SAI off, VVT off, increased LDRXN and added some soft burbles via timing.
The car has lots more torque and feels quite a bit faster, but I see HUGE timing deviations when under full load. Like from 17° to 12° back to 17° in less than a second.
Strange thing is, the same happens with a stock tune.
I read that jumps in timing could be the ECU trying to correct load. I also read that KFMIRL and KFMIOP should be inverse to each other, but to me these dont look inverse at all? Maybe I am just blind, but I wanted to sanity check.
Could someone please take a look at the screenshot of KFMIRL and KFMIOP and tell me if those are fine? I havent touched these Maps, they are completely stock.
Regarding timing jumps I will do some more logs to see what is intervening.
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gremlin
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« Reply #1 on: October 18, 2024, 04:35:26 AM »
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I also read that KFMIRL and KFMIOP should be inverse to each other, but to me these dont look inverse at all? Maybe I am just blind, but I wanted to sanity check.
Could someone please take a look at the screenshot of KFMIRL and KFMIOP and tell me if those are fine? I havent touched these Maps, they are completely stock.
You have an error. In your picture KFMIRL axes are swapped. |
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WannabeCupra
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« Reply #2 on: October 18, 2024, 06:07:46 AM »
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Thanks! You think its an definition issue? Or should I just try to swap the axis?  |
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WannabeCupra
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« Reply #3 on: October 18, 2024, 07:49:34 AM »
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Soooo, I did another log, and recorded a few more ignition values..
It seems to come from zwsol, I am now looking through the "Funktionsrahmen" to see where this might come from...
EDIT: After a bit of reading and looking at another xdf my conclusion is, that the definition file I used for the KFMIRL must be wrong. Otherwise there should be constant intervention, right?
Still didnt solve my zwsol issue...
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« Last Edit: October 18, 2024, 10:17:16 AM by WannabeCupra »
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WannabeCupra
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« Reply #4 on: October 19, 2024, 02:55:14 AM »
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I am at a Bit of a loss right now...
Logged mifa, miszul, mibeg and there is no Torque Intervention from These values... This suggests KFMIRL and KFMIOP are correct.
Also i maxed ARMD for >50% which also didnt improve Things.
Only Thing left i can think of rn is DASHPOT?
Maybe someone who had similar issues has a hint for me?
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prj
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« Reply #5 on: October 19, 2024, 04:26:54 AM »
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If you want anyone to help you, post logs and not screenshots. Everyone who posts screenshots locks themselves into one train of thought - you start to think you are so right to know where the problem is, that you don't think someone could take a step back and see the issue. Also called tunnel vision. So un-tunnel vision yourself and post logs. Says also right here in the sticky: http://nefariousmotorsports.com/forum/index.php?topic=18323.0title= |
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WannabeCupra
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« Reply #6 on: October 19, 2024, 07:39:14 AM »
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Youre right of course, sorry.
I have attached a log with 2 pulls in 3rd.
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prj
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« Reply #7 on: October 21, 2024, 05:31:18 AM »
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Youre right of course, sorry.
I have attached a log with 2 pulls in 3rd.
If you are wondering why zwout looks like a sawtooth it's because you have knock retard. Completely normal. If you want to see the actual timing long the timing array (zwoutar) instead of logging the single value that changes non-stop between the cylinders. |
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WannabeCupra
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« Reply #8 on: October 21, 2024, 11:47:33 AM »
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I still find the fluctuations a bit much tho.
Did two more pulls in 4th, where there were no timing corrections because of knock.
There are timing swings of like 4,5° from sample to sample. If you say thats normal and expected then ill shut up about it cause I am not that experienced. I just expected the timing to be more stable.
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prj
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« Reply #9 on: October 21, 2024, 01:58:13 PM »
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Set TMAR to 0xFF and you will know if it's ARMD.
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« Last Edit: October 21, 2024, 02:07:20 PM by prj »
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Nik62
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« Reply #10 on: October 22, 2024, 02:40:11 PM »
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I also have -5kw ignition angle zwgru jumping, I can’t understand why.
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WannabeCupra
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« Reply #11 on: October 23, 2024, 12:33:54 AM »
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Turned ARMD off via setting TMAR to 0xFF as suggested and timing looks a lot cleaner. After knock intervention there are some fluctuations (as expected), but nothing wild. I guess this looks fine now? Will try to find the reason as to why ARMD is adjusting timing. Or is it safe to just leave ARMD off? I also have -5kw ignition angle zwgru jumping, I can’t understand why.
This sounds like a mapping issue to me. Zwgru has always been without jumps on my end. |
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Nik62
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« Reply #12 on: October 23, 2024, 03:50:45 AM »
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I have KFZW in my map, the ignition angle is smooth without jumps, but at the output zwgru jumps -5 degrees.
Perhaps also the influence of ARMD?
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aef
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« Reply #13 on: October 23, 2024, 04:57:54 AM »
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prj
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« Reply #14 on: October 23, 2024, 04:50:15 PM »
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Turned ARMD off via setting TMAR to 0xFF as suggested and timing looks a lot cleaner.
After knock intervention there are some fluctuations (as expected), but nothing wild. I guess this looks fine now?
Will try to find the reason as to why ARMD is adjusting timing. Or is it safe to just leave ARMD off?
This sounds like a mapping issue to me. Zwgru has always been without jumps on my end.
Without ARMD it's really bad in first gear, there's a lot of bucking/jerking, you lose much of the smooth feeling of the car. Just change KFDMDARO last value to 50 (with axis value also 50) in all gears and it should take care of it. If you did it before and it did not work then probably you have also wrong/inverted axis for KFDMDARO in your definition or the map defined wrong. |
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