How to test voltage to fuel pump?

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Nightrider24 7

Junior Member
Joined
Jun 29, 2020
Posts
2
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0
Location
Ontario
First Name
Jamie
Truck Year
1987
Truck Model
2500
Engine Size
5.7
Hi. I have an 87 that has an electric fuel pump. Single tank. I have low fuel pressure. 5psi at the tank when I turn the key on. I have tried to test voltage but not sure if Im doing it right. Probe in the wires coming to the pump read 8 volts when I turn the key on. Should it be 12 at least?
Truck runs. Sputters stalls. power intermittent when I step on the throttle. Thanks. New here and starting a project.
 

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