Skoda Favorit trigger wheel - no sync at low RPM
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Skoda Favorit trigger wheel - no sync at low RPM
Hi all,
Stock 5V hall sensor on uaefi board, connected to c17 with 4k7 r1 populated.
Ecu reads rpm fine on idle and above but it doesnt sync at cranking rpm.
Tooth log is ok, no noise.
any help is appreciated, thank you
Stock 5V hall sensor on uaefi board, connected to c17 with 4k7 r1 populated.
Ecu reads rpm fine on idle and above but it doesnt sync at cranking rpm.
Tooth log is ok, no noise.
any help is appreciated, thank you
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- AndreyB
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Re: Skoda Favorit trigger wheel - no sync at low RPM
Just adjusted trigger decoder a bit, you would need to run firmware snapshot or apply same values via trigger gap override dialogYou do not have the required permissions to view the files attached to this post.
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Re: Skoda Favorit trigger wheel - no sync at low RPM
Thank You!
It is already registering the cranking rpm correctly.
There are 2 16k rpm spikes at first syncing, have tried 4 times with same outcome.
After that, rpm is stable in tunerstudio.
It is already registering the cranking rpm correctly.
There are 2 16k rpm spikes at first syncing, have tried 4 times with same outcome.
After that, rpm is stable in tunerstudio.
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Re: Skoda Favorit trigger wheel - no sync at low RPM
Okay, it is working fully. I have had to disable faster engine spin-ups in cranking settings.
I guess that 90° approximation was calculating false rpms. Now it works fine.
nice
I guess that 90° approximation was calculating false rpms. Now it works fine.
nice

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Re: Skoda Favorit trigger wheel - no sync at low RPM
OK, cranking and idling works 100% without issues.
Now i get trigger error at 2400rpm, please see attached log.
thanks
Now i get trigger error at 2400rpm, please see attached log.
thanks
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Re: Skoda Favorit trigger wheel - no sync at low RPM
please use https://rusefi.com/online/
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Re: Skoda Favorit trigger wheel - no sync at low RPM
I have tried manual trigger gap override, did not sync at all.
shouldnt there be 4.88 instead of 488?
thank you
shouldnt there be 4.88 instead of 488?
thank you
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Re: Skoda Favorit trigger wheel - no sync at low RPM
Oh yes totally a typo!
https://github.com/rusefi/rusefi/commit/5b8af9745ebfcc139d352cac79b5d3ec50a4e2c8
https://github.com/rusefi/rusefi/commit/5b8af9745ebfcc139d352cac79b5d3ec50a4e2c8
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Re: Skoda Favorit trigger wheel - no sync at low RPM
strange, now it doesnt sync with updated fw.
https://rusefi.com/online/view.php?log=1431
I have tried extreme trigger gap overrides - max at 20, then it synced a few times but had errors all over the place.
Tooth log is stable, signals are arriving correctly. Have tried differrent hall sensors, same result.
Strangely enough the typoed 488 worked fine at low rpm until 2400.

https://rusefi.com/online/view.php?log=1431
I have tried extreme trigger gap overrides - max at 20, then it synced a few times but had errors all over the place.
Tooth log is stable, signals are arriving correctly. Have tried differrent hall sensors, same result.
Strangely enough the typoed 488 worked fine at low rpm until 2400.

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Re: Skoda Favorit trigger wheel - no sync at low RPM
Please note what data point I am focusing on at https://www.rusefi.com/forum/viewtopic.php?p=50051&sid=001f969d29aa62ab090b3197184860ce#p50051
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Re: Skoda Favorit trigger wheel - no sync at low RPM
trigger sync latest ratio 0 is always 20+ from my logs.
Maybe there is a setting that i have overlooked?
or if the wheel is mirrored/rotating in the other direction.. it might explain the 20-25x gap ratio. that way cca 6° between 2 rising edges and cca 120-130° between next 2.
Maybe there is a setting that i have overlooked?
or if the wheel is mirrored/rotating in the other direction.. it might explain the 20-25x gap ratio. that way cca 6° between 2 rising edges and cca 120-130° between next 2.
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Re: Skoda Favorit trigger wheel - no sync at low RPM
okay, i have triple checked, the small tooth is at the other end of the gap.
that explains the ratio and the behavior.
The gaps are 0-134-314 falling. Ratios i am not sure about. Maybe 1,343(sync)/0,256/2,913?
same as here;
https://rusefi.com/forum/viewtopic.php?t=1937
that explains the ratio and the behavior.
The gaps are 0-134-314 falling. Ratios i am not sure about. Maybe 1,343(sync)/0,256/2,913?
same as here;
https://rusefi.com/forum/viewtopic.php?t=1937
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Re: Skoda Favorit trigger wheel - no sync at low RPM
Here is another photo of the engine with flywheel on.
Could You please change the trigger angles in the new version?
thank you
Please excuse my lack of skill in software, i know that only the vw trigger decoder angles have to be adjusted but i could not succesfully compile the firmware in cygwin.Could You please change the trigger angles in the new version?
thank you
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Re: Skoda Favorit trigger wheel - no sync at low RPM
I do not have resources to work on this
Please consider joining discord and asking the community for help with compilation or the whole change.

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Re: Skoda Favorit trigger wheel - no sync at low RPM
I have corrected the angles, behaves the same, only allows a bit higher rpm. I am not able to proceed further into the fw.
Thank You for the help. I will be watching the new releases, i hope it gets fixed in the future.
Thank You for the help. I will be watching the new releases, i hope it gets fixed in the future.
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