Car not getting fuel

[Kai32]

Howdy, long story short, I took my car for a 10 minute drive up the road and back. After not driving it for about 3 - 4 hours i decided to move it BUT when I went to crank it the fuel pump didn’t prime it made a humming noise but wasent priming. I checked fuses, ground and still no luck. Next I replaced fuel pump and fuel relay and got a  electrician to do it so it’s not dodgy. The fuel pump did the same thing as the last one hummed but didn’t prime and now it isn’t even humming? What should I try next cheers 

[GTSBoy]

Bring out the gimp.  Um, I mean, bring out the multimeter.

[TXSquirrel]

Check your voltage at the relay.  If all is good there, then check voltage at your fuel pump control module.

[Kai32]

Im gettting 12 volts to relay and 5 volts to fuel pump and it’s not working 

[GTSBoy]

2 hours ago, Kai32 said:

5 volts to fuel pump

Well, there's your problem.  Now find out why.

[TXSquirrel]

Are you measuring between fuel pump positive and chassis ground or fuel pump positive and fuel pump negative?  Voltage at the pump's negative is controlled by the fuel pump control module, so it varies.  Something like 12v for initial 5 seconds after turning ignition to on, then down to 6v, then up to 12v during cranking, then down to 6v at idle. 

Edit:

Run a direct ground for the pump is a good way to verify.

Edited April 3, 2019 by TXSquirrel