[Steve M]

I had one instance where I left the pressure sensor vacum line disconnected after I had done some work on the engine.
I had drove the car for about a block and my heart fell to the floor pan. The car had died half way but I was able to start it up again. The car felt sluggish and it was nowhere near the performance I was acustomed to and the exhaust was black when I looked in my rear view mirror.
I went back to the engine and found the sensor disconnected, reconnected it and afterward all was fine.
Quick and easy check on this situation may be to disconnect the pressure sensor and start the car and see if anything is different. Or start the car and disconnect the vacum part and see if that changes anything. Or drive around and disconnect the vacum part and see if anything is different.
I say disconnect the vacum part because I dont know how the electronic part will react when you disconnect it when there is juice running through it.