Hondata

I have my wideband output wired directly to the ecu at the ecu to pins D22 and D14. With the wideband unattached from the ecu I get a voltage reading of approx. 2.5 volts at idle. According to the FJO a/f v. voltage output graph that is around 14.7 a/f ratio. My LED display also reads approx. 14.7 ...

I went and verified that D22 is grounded by finding a car that has untouched wiring and came with a p28. With all three ecu plugs plugged in D22 is grounded to chassis ground. With only plug D plugged in D22 does not ground to chassis ground. How can i get the o2 ground signal to be the only thing ...

I don't understand why it would effect the readings if D22 touches chassis ground. Inside of the ecu D22 has a direct connection to B2 and B2 has a direct connection to chassis ground on the factory wiring harness for the civic that the p28 came in. By that logic D22 will have continuity to chassis ...

thank you for the informative reply

I know how to change the values. rom editor uses a voltage that is ouput by the FJO to calculate a/f ratio based on the values that you enter in the conversion chart. The problem is that rom editor is reading a different voltage than what is actaully there. I have verified that the voltage output ...

The set up:
88 CRX si
1st gen b16
obd-1 p28
obd-1 conversion harness by blown90hatch
hondata 4b
FJO wideband

Now for the problem. No matter what I do I can't get hondata to read the correct values from the fjo. The voltage from the fjo is correct using a multi meter but when i hook up the wires to ...

So hondata has the cool feature of being able to set a desired a/f ratio and then hook a wideband up and datalog the values according to different points on the map and then telling you how far off you are from your target. So my question is how do you decide on the target a/f values. There are area ...