If my car is sitting idling for more than like 2 min, it will start to make like a putter sound out of the exhaust for like a min then go back to normal idle... It almost sounds like its got a mild cam, or it randomly misfires for a min then goes back.. its driving me crazy!!!!
Oh jeezus, you don't need to pour that crap in your motor. While I know many people think it's 'just great' and impress their neighbors (with the smoke show using this product produces) in the trailer next door, I honestly believe you can do more harm than good using it, especially on an older car. And let's face it - a 2000 is 8 years old, probably pushing the century mark in miles. In effect, you're attempting to overhaul the motor with a liquid. I'd suggest that if you are set on using this stuff (for what reason, I still don't understand), then I'd strongly recommend doing a compression test both before and after. My point? Sometimes removing residual carbon build up is NOT a good thing, especially if you don't intend to tear the motor down afterward and replace rings, etc.
If you wish to search for "Seafoam", just google for "Snake Oil" - same thing.