I have a chiped p28 and a safc, I also have a autometer A/F gauge. I was wondering if anyone used this set up and got a pretty good street tune . I dont know if the A/F gauge is suposed to read rich if the key is in the on position but it seems to me that if theire is no fuel it should read lean. Also I heard you can hook a o2 sensor to the Apexi. please help py car runs like **** sometimes.