Where is the oxygen sensor supposed to be located on a 1985 Jeep Cherokee Chief, 2.8 liter V6? If you have a picture, I'd appreciate it! I think my emissions system has been altered, but I didn't do it, and I don't remember asking any mechanics to do it, and I've had it since 1991. Hmmm. There are bolt "plugs" in the manifold on the passenger side. Is it supposed to be there? Thanks.