I just bought a 2000 outback limited wagon with manual trans and so far, I haven't gotten more than 15mpg out of it. It idles rough until it gets up to operating temp, then smooths out for the most part. The plugs, wires, and air and fuel filters were replaced just before I bought it about a month ago. The check engine light has been on for a couple weeks now, but when hooked up to a diagnostic computer, it doesn't show any codes. Anyone else have a similar problem? Are there any common issues with temperature sensors?
Thanks for any help
Brandon