[Walt Fricke]

The "air flow switch" (a safety feature, to be sure the fuel pump won't run if the engine stalls) can't be the source of start or run problems. If it is disconnected, the pump will run when you turn the key to run, as well as to start. And it will keep running after it starts.

An easy mistake to make is to plug the cold start valve plug into this switch, and vice versa. Offhand, I can't think of the symptoms of doing that, but guys have had that problem.