One problem related to car throttle sticking has been reported for the 2002 Mazda Tribute.
Car Throttle Sticking problem
1 Throttle sticks when accelerating from complete stop due to build-up on throttle plate. Owner has provided maintenance and fuel as specified in manual, yet was told Mazda does not cover under warranty. Problem appeared with less than 15000 miles. Cleaning (at owner cost) provides only short-term remedy.