Hondata

Hi, K20A2 with PRA ECU and Kpro 4

in the attached log, 0:28 and 3:18

Why injection (ms) has this behaviour, only sometimes
drop after 2 seconds after WOT, or jagged
This cause my afr to stay rich long time, it's normal?

My tuner cannot set fuel in openloop without this strange and delayed corrections, that we don't understand.

0:28


3:18


thank you

Hi, somebody can help me?

Just tell me if it's normal or not.

Here other tests, I tried with the wideband on analog 0 (AN0) or in the ELD input.

But I can not get a constant behavior of the A/F Ratio

As you can see from the pictures, during tests, the AFR is ok for the first gear, then, after change gear, it goes rich (sometimes all the gear, sometimes just a few seconds)
It's seems better on ELD, but I should make more tests to have a right statistics.

I know, it can depends on many factors, but what I ask now, is only: It's normal? acceptable?
Or I have to investigate to find the cause?

I attach the two calibrations and logs, one with wideband on AN0 other on ELD.

Analog 0:





ELD:

The PRA does not use a wideband. It uses a narrowband sensor which cannot be used for tuning purposes.

thank you for reply, I haven't seen it

I use openloop in my calibration.

But, I would like to understand,
if you suggest to change Throttle parameters to correct this behaviour,

I would do that if this rich period can compromise performance, in your opinion.

Can you help me?

Another question, could you explain me Throttle parameters -> Tap-in -> TPS Fuel Moving

How to read "Rate of changes" and "compensation"?

And, what are "TPS Fuel stopped" and "TPS Fuel moving"?

I read documentation, but I don't understand

Thank you
Don

Have you read the information in the help file?

http://www.hondata.com/help/kmanager/th ... b=throttle

Yes, I read documentation, but I don't understand.

Documentation not explains what means TPS Fuel stopped and TPS Fuel moving.

Also, I don't undestand if a higher rate of change is related to a faster opening of the throttle, or the reverse.

Thanks

Stopped means that the vehicle is not moving. Moving means that the vehicle is moving.

The higher rate of change means a faster change between opening and closing.

Thank you very much for explanation

Now, the original question: looking at the images above, AFR rich for 2 or more seconds when changing gear, it's normal? or I have to calibrate TPS Tap-In parameters?

What's your opinion?

seems normal as they are reading form different parts of the map due to different RPMs.

I want to show you the following images with some extra lines, to show you that there is a different AFR to the same RPM.

It happens after the gears change. That is why I have hypothesized problems with the tap-in parameters.

It does not always happen, but often.

Based on the following pictures there is some advice you can give me.

Thank you

Screen shots do not tell us the whole picture. It is much easier to review if there is a calibration and datalogs for us to look at.

In the first and second post there are calibrations e datalogs of some tests