2005 Ford Taurus • 164,000 miles

1St there was a rattling under hood to the left passenger side of the engine sound like near where the belt are. Now this morning the car wont stay started unless I keep my foot on the gas peddle. Soon as I take my foot off it dies. I changed the fuel filter that did work it still dies when I take my foot off the gas peddle. What could it be?
October 20, 2013.

Spray water on belt to see if noise goes away then you shold replace the belt and tensioner as they should be at 60k. Then try cleaning throttle plate on both sides and iac hole with choke cleaner. If still there check fuel pressure with a gauge auto parts rent them

Oct 20, 2013.