# Honda K20A Trigger Problem **URL:** \ **Category:** V3 SOFTWARE\ **Created:** [June 6, 2024, 4:04pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562 "2024-06-06T16:04:50Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 6, 2024, 4:04pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/1 "2024-06-06T16:04:51Z")
Hi, I adapted a v3 calibration from my v2 version of a K20A. It looks like v3 has trouble getting a correct trigger. The engine will not start as a result. The EMU claims a sync’d trigger but the scope looks odd. Setup: ![Bildschirmfoto 2024-06-06 um 18.09.42](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/4/42e1d37a7bf7566bec3ebbabc167ddbf63d6dbee.png) Scope: ![Bildschirmfoto 2024-06-06 um 17.45.07](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/5/5aec9f6f759122c09a8fdac06fe90352f4d221ef.png) Log: ![Bildschirmfoto 2024-06-06 um 17.49.12](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/c/cebc1335641a4e6f8c7f72b13a5cda5f7b4a5edc.png) Another log looks like it is not in the correct format: ![Bildschirmfoto 2024-06-06 um 18.03.45](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/4/42148de8a40bf268da1b255f50dc66445a7e8757.png) Both logs were recorded on an EDL-1 with the new Firmware. Any help is appreciated, Christian ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [June 6, 2024, 4:22pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/2 "2024-06-06T16:22:33Z")
try cam decoder shorter than factor 0.45 what are cranking rpm and battery voltage during cranking. it is hard to spot additional tooth on crank. according log. both logs are made with the save firmware and one is good and one is ok ? ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 6, 2024, 4:33pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/3 "2024-06-06T16:33:39Z")
What do you mean by cam decoder shorter than factor 0,45? Cranking gap detection scale? Cranking RPM is around 170 to 250, battery voltage is 8,8 to 10,0 V during cranking. I think my starter motor has some shortened windings. Both logs where recorded with v3.027. Thanks! ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 6, 2024, 4:35pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/4 "2024-06-06T16:35:36Z")
The EDL-1 is on firmware v1.15 ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [June 6, 2024, 4:39pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/5 "2024-06-06T16:39:17Z")
go to cam configuration and change n+1 to shorter than factor and enter as a factor number 0.45 ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [June 6, 2024, 4:45pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/6 "2024-06-06T16:45:04Z")
we will investigate the problem. ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 6, 2024, 5:11pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/7 "2024-06-06T17:11:33Z")
For your information: The car started with the v2 software without problems right after I tried the v3 (same state of charge of battery). ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [June 6, 2024, 6:14pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/8 "2024-06-06T18:14:49Z")
try shorter than factor cam decoder. k20 engines were tested without issue on v3 ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 6, 2024, 6:15pm UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/9 "2024-06-06T18:15:29Z")
Tried your setup and car fires up and then dies immediately. Triggers look good so far. Scope 1: ![Bildschirmfoto 2024-06-06 um 20.11.42](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/a/a4f6c339a093c0f170a65b2d7a5c9ff43292a043.png) Scope 2: ![Bildschirmfoto 2024-06-06 um 20.09.01](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/1/18aea51b92ddf90311ce3cfbdc61b0b6ad010bd4.png) I have to investigate deeper tomorrow, I call it a day. Thanks! ---
**Author:** ![Mlynek](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mlynek/32/3773_2.png) [@Mlynek](https://community.ecumaster.com/u/Mlynek)\ **Post date:** [June 7, 2024, 5:43am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/10 "2024-06-07T05:43:21Z")
I think your engine is flooded with fuel and that’s why it starts and dies. Why are your injection times so high? ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 7, 2024, 7:51am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/11 "2024-06-07T07:51:42Z")
Yes, this is possible. The cranking fuel is quite different to v2 and I still have to adapt it properly. ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 7, 2024, 9:17am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/12 "2024-06-07T09:17:56Z")
It is way too much fuel. A third would be ok. The fuel table generates too much fuel. My lowest RPM is currently at 500. Since we now have the possibility to have different RPM axes for VE table #1 and #2, I will setup a row at 200 RPM in VE table #1 for cranking. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [June 7, 2024, 9:24am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/13 "2024-06-07T09:24:13Z")
You can always lower the cranking scale ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 7, 2024, 9:41am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/14 "2024-06-07T09:41:14Z")
True, but I would have to put negative values in there and it might not blend into the afterstart as nice when RPM goes up. Having a correct fuel table at cranking RPM would be more elegant. I am working on the fuel tables right now 🙂 ---
**Author:** ![ChristianGrebe](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/christiangrebe/32/891_2.png) [@ChristianGrebe](https://community.ecumaster.com/u/ChristianGrebe)\ **Post date:** [June 7, 2024, 9:44am UTC](https://community.ecumaster.com/t/honda-k20a-trigger-problem/1562/15 "2024-06-07T09:44:57Z")
Again a huge thanks for giving us separate RPM axes for the VE (and ignition) tables. That helps a lot! 🥳