Longshot, but look in the distributor cap for oil, if you find any change the o ring on the distributor shaft, the oil when cool will foul the inside of the cap and when it heats up it drains down

__________________
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