fuel pump pressure

[redzone087]

Is there such thing as a fuel pump pressure sensor. My fuel pump is shutting off and not keeping the line pressurized. When I pulled the fuel line from the fuel injectors it runs fuel in great but then just stops after a few seconds.

[evildky]

nope, but sometimes when pumps get old they fail under pressure, might work fine at idle but when you are driving and vac goes down pressure comes up and the pump can shut off

some models do have a fuel pump modulator that varies the voltage to the pump but doesn't shut it off