The FD I bought came with Power FC and exhaust temp gauge from another brand, it appears to be running rich from the smell so I decided to plug in a wideband O2 to check it out. Interesting finding is that the stock O2 wire has been cut off, knowing that Power FC can run without stock O2, but does Power FC not use one??

After hooking up a wideband O2 at the stock location, it show 10.5 AFR to 11AFR most of the time, but I can't seem to find another O2 sensor, yet. Unless the little bun is the O2 sensor, which I though it's the exhaust temp sensor cuz I've never seen an O2 sensor that small.... plus...if I trace the map at idle and modified the mapping to use 1.000 for the AFR adjustment, the engine idle much better, so obviously it's using some O2 sensor somewhere..just can't find it yet, without lifting the car high enough... anyone that may shine the light? thanks.