Hey I found the problem with our 86 300e warm start problem.
After trying a fuel pressure regulator that didn't siolve the problem we put in a new fuel pump check valve and problem solved.
Irieite defined a sysmptom that got me thinking. Thanks.
Since I couldn't detect any sign of leakage to the outside of the fuel system or into combustion chambers I figured it must be seeping back to the tank.
$28.00 and change and my wife is happy. Happy wife, happy life.
Thanks again.
Next is cruise control and climate control vacuum leaks.