I own a well maintained 1987 760 Turbo wagon that has developed a stalling problem that I cannot figure out. I have gone over everything I know and gone through the FAQ troubleshooting area. Recently my car has been stalling. This happens at anytime, in the driveway or on the parkway. The car always starts right back up and seems to run fine, but it always continues to happen. I would also add that it does not seem to start up as well on cold mornings as it use too ? I usually have to crank it two or three times before it starts, but then it starts and runs fine. Within the last 6 months I have done a good tune up, (plugs, cap, rotor, wires, fuel filter, air filter). New dist was installed, New O2 sensor, wiring harness is less than a year old. Fuel pumps, relay and radio relay are fairly new and fuel pressure is good, I have a gauge installed. I have checked all grounds, checked fuel injectors and everything is good. I am stumped....Please help

Thanks,
Mark