JDM P72

[HondaTechn303]

I got a JDM p72 ECU w/ S300, B18c1, B16 Tranny, Type R Cams(In. and Ex.). Im looking into buying an Innovate Motorsports MTX-L Wideband Sensor.. I seen in other forums, people talk about removing resistor's.. Will I need to do the same thing with my P72 ECU..

[Spunkster]

http://www.hondata.com/techplxwiring.html

Follow the instructions for the PLX we have posted, just substitune the correct wire colors for your setup.

[HondaTechn303]

What I need to know though is, does the JDM P72 ECU have the resistors that need to be removed??? or only U.S. Ecu have them??

[Luke]

i have never removed any resistors to connect the wideband.

the thing is: the ELD connector can only read up to 3.8Volts, so your data resolution is from 0-3.8V between rich and lean.

your device gives a resolution between 0 and 5V, so 0V = AFR 10 and 5V = AFR 20

so AFR at 3.8V will be pretty lean, anything above isn't neccessary and dangerous, so you will and should always stay below those 3.8V, since stoich AFR is somewhere around 2.5V.

if you don't care, let it be like it is. it will work just fine.

another option is to change, if possible, the resolution of your gauge. with my innovate LM2 i can just program it, as i like.

best regards Lukas

[HondaTechn303]

Hey, Thank you very much... Very well explained...

[bb4lude]

i have never removed any resistors to connect the wideband.

the thing is: the ELD connector can only read up to 3.8Volts, so your data resolution is from 0-3.8V between rich and lean.

your device gives a resolution between 0 and 5V, so 0V = AFR 10 and 5V = AFR 20

so AFR at 3.8V will be pretty lean, anything above isn't neccessary and dangerous, so you will and should always stay below those 3.8V, since stoich AFR is somewhere around 2.5V.

if you don't care, let it be like it is. it will work just fine.

another option is to change, if possible, the resolution of your gauge. with my innovate LM2 i can just program it, as i like.

best regards Lukas

So your saying if you do cut the two resistors, then the data resolution is improved from 0-3.8 to 0-5v is this correct?

[Luke]

something like that happens.

i have never done that, because it isn't necessary and on the other hand i can program my wideband, so i can make a full AFR 10-20 resolution in 0-3.8V.

best regards Lukas

[bb4lude]

Ok good info thanks