DBW as Idle control - cant get it under control

EMU BLACK / CLASSIC
1

EMU Black V2.175 plus FW

Hey everyone. I am running a K20a with a Honda J37 DBW setup, I want to use DBW to control ASE,Warmup and Idle before handoff for efficiency and smooth control. The DBW is fully functional (I have another map that uses fuel/igniton for idle that is rough but works).

Cranking is fine, it starts well, then the idle shoots right up to 2500rpm (and bounces off the soft limiter I have set) when it should be around 1400rpm when cold (depending on CLT), from the logs I can see two things:

  1. Idle control is not active
  2. DBW blade target is stuck at 7.5% which I think is the cause for the high rpm and probably related to (1). I’ve also noticed its stuck at 7.5% with the engine not cranking!!!

Disclaimer: I am not an engine tuner, the MAP has been done already so have not touched the VE map, cam nor ignition tables (apart for 1 degree extra bottom left for low rpm cold starts).

I’ve learnt and read loads before I started looking at this and I think I am very close, I just cant figure out the two issues I am seeing and I am STUCK.

For diags, I;ve captured a few different parameter log files and the map is here: EMUDBW

If it takes a professional to take a look then so be it, but I feel its just a simple config.

I’d be very grateful if someone could help? Thanks in advance. Kev

2

Minimum map for idle is at 100kpa , afterstart release rate is too low , idle range is set at 6% while max idle dc is also set at 6% , pid deadband rpm is also very low at 25 rpm, delay to activate also very low at 1ms

3

:slightly_smiling_face: Better?

PS Its High Compresson 12.5:1 with agressive cams.

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4

No, not better. Just press the question mark and read the description, this will help you actually understanding what a parameter does before you enter random numbers✌🏾 97kpa is basically wide open throttle. Why should this be the minimum map for idle control to activate?

5

OK - I am at the limit of my knowledge, could someone recommend a tuner that knows the EMU black at a deep level who could help remotely, happy to pay for their time. I am in the UK

I’ve tweaked the map as discussed by baxtercraft (and saved it in the directory link in my original post), but things have not improved.

6

Issue turned out to be excessive ignition trim contributions, kpa being wrong and also the position min voltage needing to be 0.50v