ok i just installed my gredy air fuel gauge went threw the break in prosess and warm up process now i am confuzed which is lean and which is rich......it reads on one side 16.0 and the other 8.0
which is wich

 

lower numerical ratio is rich and higher is lean

 

that's a really nice gauge. it's supposed to be really accurate and expensive

 

Yeah Mad expensive, 340
but if its accurate then its worth it.

 

Did you do the required burn-in on the sensor? Even after doing a 20 minute 700 degree celcius blast down the expressway 4 days ago my gauge didn't start reading correctly until today. All of of my RX-7 and Skyline friends encountered this also. As soon as I think the thegauge is good to go I will be connecting the green Greddy wire to the o2 signal wire for the ECU. Where did you mount it? If you mounted it more than 300mm away fron the header flange it might not read correctly. This info is straight from the Japanese manual. I'm also using select setting #1 since my sensor is mount right below the turbo (like most stock turbo cars) and I hit EGT's from 700 to 810 degrees celcius.