My 1998 Supra Comp with the HO EFI PCM engine started stalling
intermittently and won't restart. I can feel the engine hesitate and sputter before stalling. After sitting for an hour or more, the engine will restart and run fine. I had the fuel filter and spark plugs replaced last week and the dealer indicated this will fix the problem. They ran the engine to operating temperature with no problems. The same problem happened again today and I have not been able to get the engine restarted. However, when gas is poured into the butterfly valves in the intake the engine will start and run briefly. Temperature seems fine.

When I turn the key to the on position, I am not hearing any fuel pump activity. Any suggestions?