In any episode where the ghost containment unit is either accidentally or deliberately shut off and about to explode, the time until detonation varies between 30 and 60 seconds. Also, in every instance in which the Ghostbusters are trying to "beat the clock" to try and get the unit back on, the scene always takes longer than the actual countdown. I.E.: If it's 30 seconds until an explosion, the scene will take up to a minute or more, yet they are able to restore power "in the nick of time".
Though the series takes place in 1980s New York City, the traffic lights in some episodes only have red and green light - no amber
The Ghostbusters are on several occasions seen using helicopters, but these helicopters have neither tail rotors nor contra-rotating rotors. The lack of one or the other of these should mean that the helicopters would simply spin around due to torsional force. While the helicopters do appear similar to autogyros, they lack the rear propeller, so they are not autogyros.