I have an S300j in a p72 JDM ecu. I have an Inovative Perfomance Wideband hooked up to the exhaust. When I increase the injector multiplier, the engine sounds as if it is richening up but the O2 reads lean. When I decrease the multiplier the opposite occurs. I tried hooking up the wideband to another car and it worked fine. I then tried swapping in a ecu, and the readings were normal. Anyone have any idea what's causing this??
It seems as if the injector multiplier numbers are working in reverse, higher numbers lean the car out and lower numbers richen it.