Just for my information, was this oxygen sensor under the vehicle on the exhaust, or closer to the engine near where the manifold connects to the pipe. The reason I ask, and some more info you might need to know, is whether or not this is a California vehicle. A California vehicle will have two cats, and the downstream oxygen sensor is actually before the cat that is under the vehicle, so it would appear to be the front sensor. An easy way to detect Federal vs. California, is look at the underhood emissions label, it will have some wording about California if it is California emissions, or it will say Federal. As far as a check for lack of air intake, a compression test might be revealing. Remove all air piping to the throttle body. It is going to have to have exhaust to have intake. Another question I have, is the check engine light on, or are any codes stored. What is the condition of the timing belt, or the timing in general? If the cam timing is off, you may have this type of condition as well.
Saturday, March 26th, 2011 AT 2:06 AM