Hondata

Hello!

I made this display myself, wanted to go for the mid 90s luxury sport vibe. I hope yall enjoy! :D

Just wanted to state that I solved this problem! The answer is very stupid bit I am still learning! The 01 Prelude uses OBD2A while the p72 s300 I am using is OBD1. I was using the OBD2A pinout for the wideband wiring when I should I been using the ODB1 pinout!! So for anyone wiring up a wideband ...

I rewired and removed the resistors. The gauge now reads a lot closer to what the hondata is reading, hondata will read 17.8 AFR while the guage reads 22 AFR Is this still bad? or can I adjust voltage offset to counter this?

Spunkster wrote: Wed Jul 03, 2024 2:22 pm It should be ok

I grounded the black wire and cut the resistors for D10. Since I switched to D10, should my wideband target voltage be higher now? Right now it is set to 3.11V

Spunkster wrote: Wed Jul 03, 2024 12:55 pm Solid chassis ground or the thermostat housing is best.

Is it okay if the black wire is grounded directly to the thermostat housing? Since the ECU itself is already grounded to the thermostat. I also very much appreciate your advice and help : )

Spunkster wrote: Wed Jul 03, 2024 11:53 am Have you changed the ground as recommended?

I have not changed the ground yet, is there any place you recommend? I used the radio ground because I checked it and it is very low resistance to engine/body.

Spunkster wrote: Wed Jul 03, 2024 9:58 am We do not recommend using D14 at any time with any sensor other than a stock narrowband.

Understood, but if I use D10 and remove the two resistors do you think that would alter or fix the ground offset?

Do not use the radio ground. Instead use a good solid chassis ground.

Do not use D14 as the input as it cannot see the full voltage range. Use D10 instead.
Details can be found at: https://hondata.com/help/smanager/widebandlambdaparameters.htm?zoom_highlightsub=wideband


I was under the ...

Hello,
I am running an AEM X series 30-0300 Wideband with a p72-s300.

My problem is that the AEM guage is reading differently than what the s300 is reading, AEM will read a rich AFR (12-13) while the s300 will read a lean AFR (16).

The AEM wiring is as follows:

Black wire: Radio ground
Red wire ...