yamaha

Just checking. smile.gif

I'm going to trace the wires from the ECU to the connector, and then try to flip the wires.

DTN

Just get under the car whereever you did your splicing of the wires before and switch the same color wires around.

yamaha

I switched both the white wires around, same thing happening. I also tried switching the black and grey for shits and giggles, same thing happens. I did unhook the primary oxygen sensor and the ODBII software was reading a constant .475. With the oxygen sensor plugged in, I was getting ups and downs betweek 0-.475. I tried both the old ECU and new one and same problem persists. I'm leaning towards a bad connector plug on the harness side. There is some slight damage, meaning the plug slides in to easy and the clip will not hold the molex plug from the oxygen sensor firmly. Thoughts?

Jay-M

You mentioned that you were going to swap the ECU from the Beta accent and see if the ECU is the culprit? how's that going?

yamaha

Did that, nothing.

Jay-M

check the continuity of the wires from one end to it's other end and see? if the ECU and o2 sensors swap did nothing, then it might be the wires