i am new to the forumn,i have a 1992 sedan deville with 85000 miles,recently while driving when i make a sudden stop the car dies,also while i was giving a jump start to a friends car while reving the engine rpm,when i release the throttle there was a clunk noise made idid it several times and it continues to make this noise,any one have any clue what may cause this and what is my solutions.