Popping Sound, and then the sound of a shredded belt.. ..tick tick tick tick...
Last night while driving on the highway (65 mph), I heard what sounded like a belt that shredded, with some "slapping" or very fas ticking as if a part of the belt was slamming against engine parts.
Later the sound went away, and when coming to a stop, the engine stuttered and died. The engine idled rough for a few starts afterward, but now seems to be okay, other than chronic detonation when accelerating (regardless of octane use)
I thought it was the timing belt so I had it replaced. As it turns out, the belt was in okay shape, with no apparent damage. The outer serpentine belt is/was cracking, and so I replaced it too.
It passed a smog test here in California just a week or so ago. As well, no codes have been thrown.
What else would cause this "popping" sound and then apparently go away?
Thanks in advance..