Thanks Mike, i'll take a look for the diagram, and let you know! I appreciate it! I dont know what it is, but it does have a fuel line coming into it, and one that goes out of it to the fuel distributor, also, an electrical connector, and one vacuum nipple. When i turn the ignition, it makes noise, like a clicking sound. I have no idea what the hell the thing is, but when vacuum is applied to it, it noticably changes the idle. It does not look like the photo you provided, with all the vacuum lines. At first i thought it had two vacuum connections, but it has only one, the other is the electrical connector. Thanks again for all your help Mike! If you could also let me know what you think this thing is, that would be great!