Having problems with my 1987 760 turbo wagon. Help please ! Cant figure this out ? Problem started two weeks ago and has gotten worse, especially as it has gotten colder. Initially the car would stall for no reason once or twice after start up, but seemed to stop stalling and run fine as the engine warmed up. It ran and idled fine until it stalled, it would almost seem to miss and then die. Today it is cold out and everything has gotten worse. It now seems to miss at hwy speed. Tach drops, sometimes it dies, but always restarts. At a light, sometimes the idle will surge for no reason and the the engine will stumble, barely running ? The car is well maintained, many new parts. Recent tune up, fairly new dist and coil, new wiring harness, throttle body cleaned, no vac leaks or tears in turbo hoses, good, steady fuel pressure, even the injectors are fairly new. Any help would be appreciated, I'm stumped ?