I have a 1999 4X4 Durango, 5.9 literwith about 73K miles.In the past few months, it has simply shut-off while driving. It acts like it has no spark at all. After sitting for about 5 minutes, it starts right back up again and may not do it for weeks. I have had a dealer run diagnostics on it, but found nothing. It is very irritating as it is very unpredictable as to when it's going to happen. Otherwise, it runs great!
Any ideas?...