Subaru Problems? Ask a Mechanic for Answers ASAP
Hello, I'd be happy to help! Do you have access to a scan tool that shows data stream information?
Ok good, with it running and at operating temperature check your fuel trim numbers, also check the o2 sensor voltages to check if they're switching correctly. Have you checked the misfire counter? If so, how often are the misfires registering and is there any cylinder that has a significant amount more than the others?