A rough idle can be caused by many things. How you described it sounds like there may be a problem with the Throttle Position Sensor. Do the RPM's go up and down before the engine dies?
Also, have you had the computer scanned for codes? Most nationally recognized parts stores will do it for free, and it could help point us in the right direction.
Let me know what you find.
Thursday, December 18th, 2008 AT 9:20 PM