I had an automatic el and thats exactly what happened to me last week. The next day on my way to the mechanic one of the times i let go of the accelerator it made a couple louder clicks and the engine turned off. I tried to start it and the starter just kept clicking. Apparantly i bent my valves is what my mechanic told me and i need to replace my motor. I just thought id tell u just incase it is the same problem u can know what to expect and get it fixed. However i am not sayin thats what it is in your car but thats just the same thing that happened to me and i couldnt figure out what was causing that rattle. I hope it helps.