Hondata

Hi Hondata team,
I am tuning currently an EP3 (europe) with KPro4.
In datalog I found, that the lambda shows always Lambda 1 (14.7) so I am currently unable to configure the fuel mixture....
The Voltage of the O2 stay on 0.90V also if I add fuel on the table.

This car has fitted as primary O2 sensor an NGK O2 meter
NGK Lambdasonde 0061 for HONDA K20 Type-R 1998
(OE number: 36531-PRA-G010-M2 36531PRAG01 36531PRAG010M201)

Is the wrong o2 sensor fitted or selected in the closed loop setting?

It is strange because the FN2 has also fitted an narrowband and showing rich values.

> Is this normal on the EP3? Must be an wide-band AEM O2 sensor must be fitted to show the rich values?
Datalog: The calibration I have sent to Suuport@hondata.com for review.

Thanks for input.

The PRA ECU uses a narrow band, which cannot read lambda.

So it is normal that at WOT AF 14.7 (lambda 1) will be dispalyed?

I guess the narrow band is also be able to show AF 12.5 (lambda 0.85) - or not?

Yes, normal. A narrow band can only show richer or leaner than stoichiometric, and has significant hysteresis, so it not useful for tuning.

Thanks for information. The customer will add the AEM wideband ... :) Then we will continue.
Something new learned.