My 1986 300E will die in the middle of the street and not start for 5-10 minutes and then will run for 5 minutes and die, when trying to start it sounds like detonation and wont start, wait a while and it runs normal and then stops dead, I do notice that there is black carbon soot on the back bumper where the tail pipe is and it smell like it's running very rich, it was towed today, anyone know what this could be ? it's getting a good flow of gas to the pressure regulator I suspect an O2 sensor or the pressure regulator, does this car have a computer ? HELP

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles