Honda K20A Trigger Problem

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:

Scope:

Log:

Another log looks like it is not in the correct format:

Both logs were recorded on an EDL-1 with the new Firmware.

Any help is appreciated,

Christian

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 ?

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!

The EDL-1 is on firmware v1.15

go to cam configuration and change n+1 to shorter than factor and enter as a factor number 0.45

we will investigate the problem.

For your information: The car started with the v2 software without problems right after I tried the v3 (same state of charge of battery).

try shorter than factor cam decoder.
k20 engines were tested without issue on v3

Tried your setup and car fires up and then dies immediately. Triggers look good so far.

Scope 1:

Scope 2:

I have to investigate deeper tomorrow, I call it a day.

Thanks!

I think your engine is flooded with fuel and that’s why it starts and dies. Why are your injection times so high?

Yes, this is possible. The cranking fuel is quite different to v2 and I still have to adapt it properly.

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.

You can always lower the cranking scale

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 :slightly_smiling_face:

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Again a huge thanks for giving us separate RPM axes for the VE (and ignition) tables. That helps a lot!
:partying_face:

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