Hondata

Hello guys,

I don't think I've ever had this issue with S300 before, nor that I noticed

Fuel injection time is changing when ELD voltage is changing

At first I wasn't sure if that was the issue but following a thorough step by step of what it could be, I am now sure that it is the issue and potentially a bug somewhere because as far as I'm aware, the ELD should not affect the fuelling

It's a basic setup, 1000cc ID, 4bar map sensor, turbo charged B18C

I started mapping the car and when I opened the window to put the dyno commander through, the engine tone changed and after further inspection, the car was going lean as I press the windows open switch

I knew my deadtime correction were correct but I still double check
Fuel pressure not moving
Battery voltage not moving (Above 14 at all time)
Voltage at injector not moving (Above 14 at all time)
Battery reading on issue not moving (Above 14 at all time)
ELD enabled, disabled in the S300 was making no difference
Deadtime set to 1ms at all voltage did not make any difference

The only thing that was moving was the ELD voltage and at the same time the injector opening time

I ended up disconnecting the ELD input to the ECU and it immediately fixed the problem which also seems to have increase the base deadtime somewhere in the background to the overall map

Any idea what it could be?

You can see on log attached the ELD moving as well as injector duration between 25 and 40s of the log
This is by simply turning the interior heater on and off

please post the calibration the datalog was made with.

Map that came with the car from previous tuner and the one I started with

Both did the same thing

Which calibration was the datalog made using?

"B18C forged 1000cc..." but it may not be exactly the same calibration from the datalog as I've tried many different things in a short amount of time

Do you need the exact same calibration the datalog has been made with?

Please make a new datalog using the calibration you are currently using and then post them both here.

I don't have the car with me anymore, I'll see it again on the 19th of March

Do you have any idea what it could be? Do you need both map and log matching to possibly spot a bug?

Without matching calibrations and datalogs it is hard to guess what it might be.

The issue that you can see on the log is exactly the same with either map attached (Or the exact same one that would have been made for the log attached)

ELD voltage moves when you open windows/turn heating on etc...which is normal, but injector opening times moves for no reason when eld voltage moves for a specific held cell making the AFR moves accordingly

ELD physically disconnected and neither ELD voltage moves nor injector opening times for a specific held cell in the map

This sounds like the dead time are set incorrectly for the injectors you are using.

I have used those type of injectors on 100s of build, the deadtime is correct but even if it was wrong, I've set the deadtime to 1ms everywhere and the issue was still there, ELD voltage moving, PWM signal moving at the same time

Did you take a look at the log?