JayRSXS

Anyone know which resistors on an 07 ap2 do you cut on the ecu to utilize the the wideband eld option. Can't find a direct answer...

SLWS2K

https://www.s2ki.com/s2000/topic/109...band-question/

JayRSXS

Still not reading the same or passed 12 doing all that

SLWS2K

I ended up using the egrl input per my tuner (vitviper) for better air fuel readings at the pcm. Can't remember why but something to do with the input voltage readings are better on the egrl vs the eld input. Don't quote me on that though

JayRSXS

It doesn't have the egrl input on mine

VitViper

^ Bingo.

Almost none of the AP2 ecu's have it -- Hondata can add the EGRL circuitry for you, and boost control (PWM circuit) for you if you send them the ECU.

The ELD input sucks because of the resistor (resistors? or even other circuitry possibly) preventing voltage readings below 1v (basically it always reads at least 1v no matter what). So with most widebands that amounts to not seeing below 12 afr or so. I'm not sure what circuitry needs to be modified to resolve this, or if it's even possible to do so on this ECU (it was on the old PRB RSX ECU's).