Volvo: Special starting procedure, air intake hose, buffalo winters

Question
'87 740 GLE starts 100% of the time if the air intake hose to the manafold is disconnected and a shot of Carb cleaner, WD-40, or maybe shaving lotion is sprayed into the TB. This always results in an instant start but rough run until warmed up and then it smoths out. However if this step is skipped I can crank the car forever and nothing happens. Previously the car would start normally about 1 in 50 times but it is so consistant to have to spray the carb cleaner that I no longer try to start it without doing this. Not always pleasant in Buffalo winters.
Both fuel pumps and fuel pressure is good. Injectors work perfect. Spark is present. Jetronic unit works perfect as well as air sensor (swaped with known working units-no change). Same with fuel relay. Fuses all good and troubleshot.
Hall efect sensor is good. Check valve replaced. FPR replaced.
I suspect I can not be the only person on earth with this experience and would appreicate any input from anyone who has experienced this situation or anyone who might have any suggestions to fix the problem. 4 different garages have not been able to do so. Of course, I suspect a dealer could at $$$$$.
Thanks in advance.


Answer
Hello Charles! Have you cleaned and adjusted the throttle body? If not, would suggest that you do. If that does not fix it, you may have to take it to someone who knows Volvo. It sounds like someone has been guessing at the problem. It may cost you more money to keep guessing at it. Try cleaning the throttle and let me know what happens.


Jimmy