My frontier has 352k miles on it. I have always self serviced this truck. Other than routine maintenance, I really haven't had to do much, I've always been able to find the issue and correct it....till now! I need some help. The problem is not to anything I've recently done as it was there before. Will idling it sounds fine and run a fine, no skipping, jumping etc. Then it just dies. While driving today, it cut off on me, I left in gear in hopes that it would pick back up, but did not. Once on the side of the road, it crunk right back up and later does it again, only this time it recrunk itself before it stopped while in gear? Since these issues have started, I have given it a complete tune up, like I said it runs great then bam it's dead. No codes at all. Any ideas?