- Mon Sep 30, 2019 2:42 am
#38132
So long story short - started conversation on Audi 2.1 10v turbo engine form nasty mechanical fuel injection to full EFI with electronic injectors (DEKA 630cc) and ECU controled spark.
First attempt was to run spark with basic distributor setup. Got it running, idled fine, but when i rev`d engine past 2k, it started to missfire very, very badly. Somehow messing around found out that it could go to 4k rpm`s when dwell time was lower - set to 1.2ms, not like it suppouse to be - 3ms.
Stared tuning and obviously spark was getting blown out @ 0.7 - 0.8bar, because of that small dwell time.
After that i scoped the igniton output and found out that ignition pulses when rasing dwell past 1.2 ms stared to get messed up - misaligned from what it needed to be. Here is the video - https://youtu.be/8wBixpQo8vY
Ok, got rid of idea to run it with basic distributor, and built new setup - 60-2 on crank with vr sensor, 1 tooth on cam with oem hall, so i can run sequential ignition with BMW COP`s and two VW ignition modules.
Now dwell time is how it needs to be - 3ms (and easily changable). But now the issue is that i cant rev it past 5.4k - 5.5k rpm`s, it just sits there. Limiters ar set to 6k soft, and 6.1k hard.
Using newest (at this time) - September release. Thought mby that was the issue, so changed to older ones, but with no luck.
Next I thought that the VR sensor was acting up, so changed to Hall, but still nothing changed, same problem.
And not so important, but i think related - car taho is showing only to 4.5k, when tuner studio shows it past 5k rpm`s. Cars tacho is directly wired to Ecu`s tacho output with 10k pullup to 12v.
Oh, and one more thing - injectors are set to run simultaneously, and all 5 of them are hard wired all together, because injector output channel 3 isnt working when set to 5 cylinder count in setup, but it works when set to 4 cylinders (so the channel works), so alternating on 5 cyinder setup isnt working either - channel 1, 2 and 4 works ok, but not the 3rd one, dont know why.
(PS I know that on alternating setup 3rd and 5th injector needs to be connected on 3rd channel)
Cant figure out these issues.
Added a tune file and a datalog. (TPS is not calibrated in this one
)
I`d grateful if someone could help.
First attempt was to run spark with basic distributor setup. Got it running, idled fine, but when i rev`d engine past 2k, it started to missfire very, very badly. Somehow messing around found out that it could go to 4k rpm`s when dwell time was lower - set to 1.2ms, not like it suppouse to be - 3ms.
Stared tuning and obviously spark was getting blown out @ 0.7 - 0.8bar, because of that small dwell time.
After that i scoped the igniton output and found out that ignition pulses when rasing dwell past 1.2 ms stared to get messed up - misaligned from what it needed to be. Here is the video - https://youtu.be/8wBixpQo8vY
Ok, got rid of idea to run it with basic distributor, and built new setup - 60-2 on crank with vr sensor, 1 tooth on cam with oem hall, so i can run sequential ignition with BMW COP`s and two VW ignition modules.
Now dwell time is how it needs to be - 3ms (and easily changable). But now the issue is that i cant rev it past 5.4k - 5.5k rpm`s, it just sits there. Limiters ar set to 6k soft, and 6.1k hard.
Using newest (at this time) - September release. Thought mby that was the issue, so changed to older ones, but with no luck.
Next I thought that the VR sensor was acting up, so changed to Hall, but still nothing changed, same problem.
And not so important, but i think related - car taho is showing only to 4.5k, when tuner studio shows it past 5k rpm`s. Cars tacho is directly wired to Ecu`s tacho output with 10k pullup to 12v.
Oh, and one more thing - injectors are set to run simultaneously, and all 5 of them are hard wired all together, because injector output channel 3 isnt working when set to 5 cylinder count in setup, but it works when set to 4 cylinders (so the channel works), so alternating on 5 cyinder setup isnt working either - channel 1, 2 and 4 works ok, but not the 3rd one, dont know why.
(PS I know that on alternating setup 3rd and 5th injector needs to be connected on 3rd channel) Cant figure out these issues.
Added a tune file and a datalog. (TPS is not calibrated in this one
) I`d grateful if someone could help.
Attachments
(53.22 KiB) Downloaded 363 times
(817.35 KiB) Downloaded 311 times
- By hoopstar