Do a search for death rattle. Horrible name and horrible sound. There was a thread lately started by Dizzy asking about it and there were some good answers.installermarc said:I know I am not new to Mustangs (mainly 64-67 and fox body 5.0's), but what the hell was the death rattle? I guess I am not too much at risk with my computer, but like G.I. Joe said, knowing is half the battle.