I wish I was there to help. However, I can't be. The o2 sensor will most likely get rid of the running problem you're having. However, the noise is another thing. Since you know it needs an o2 sensor, get that replaced. After you get it running correctly, we'll work on the noise. Does the sound happen when you run anything electrical? It wouldn't be the serp belt sliping when a load is placed on the alt?
Also, I'm not sure what valve you are refering to above the intake. Is there any way for you to identify it?
Let me know how you make out, and we'll go from there.
I loof forward to hearing from you.
Sunday, October 5th, 2008 AT 9:40 PM