Originally Posted by reid-o
It might be compounded by having the o2 post turbo. Are you running off the wideband only?
ViPec (and all other standalones that I know of) can't/won't operate and read the Subaru factory front O2 sensor. One could theoretically move the wideband pre-turbo and use an EGBP compensation. I'm sure the OEM's have equipment to do this but the only one I've seen at the consumer level is the newer AEM 4-band UEGO controller that has an optional EGBP sensor and compensation kit.