I installed a new wideband air/fuel sensor and gauge on my 83' GTV6 to try and find out why it's running so lean (plugs are WHITE and it pings at high rpm when warm). I am unable to get the gauge to stay anywhere except 7.4 (where it starts measuring) or 22.5 where it stops. Based on what I have read, I should be metering between 14 and 15 when idling. I have tried to adjust the AFM while idling to get it to read in that zone but am unable to stop the values from jumping all over the place. It only blips between these 2 values momentarily under load and acceleration. What can I check next? I have checked all of the common problems eg:vacuum leaks, unmetered air etc. O2 sensor is new, fuel pump is new, coolant temp sensor is new....it runs well except when warm. What in the hell am I missing? Is this injectors? or? Any help would be appreciated.