Daughter owns it, and she lives in another state.
About 2 years ago, during interstate driving, the car started missing badly. She pulled off at a rest area, waited a while, then restarted the car. It ran OK until she got home. CEL was lit, but the missing stopped. Took it to her local mechanic and found that one spark plug electrode was badly bent. Replaced the plug, ran fine.
Fast forward to yesterday.
Driving on the same interstate, and the car started missing badly, and CEL was flashing. She was near an exit, so pulled off, got towed to a Nissan dealer, and drove home in a rental they provided for her. Got the call this morning that one spark plug electrode was badly bent. They replaced that plug, and she is now driving home. This time she knows it was the #4 cylinder. (She doesn't know which one it was the first time, but will try to see if her mechanic has a record of it.)
Any clue what could be causing this? It seems like if there was a mechanical interference problem, it would happen right away.
Thanks!
Craig