EFI Fuel Pump Question...Possible Pump Failure

[stock74]

My Bronco has been starting and running well and maintaining good fuel pressure. However, the other day when I went to move the Bronco from the driveway into the garage it would not start. I have an fuel pressure gauge mounted in the cab (has an electric sending unit). I noticed there was no fuel pressure and around the same time noticed the fuel pump was not making any noise when I turned the key to the run position.

At this point I checked the fuses and relays which checked out just fine. Then I verified the connections at the pump are good and 12 volts is momentarily being supplied when I put the key in the run position. The pump is external and mounted on the frame rail so I decided to hit the side of the pump a few times with my hand. After hitting the pump it started working again and the engine and fuel pump ran fine.

Is this a sign of the fuel pump going bad?

Thanks for your help!

 

[Viperwolf1]

Well, it ain't a good sign. Check the power connection and ground.

 

[craigaria]

It could have possibly been a piece of debris that you knocked out. But I wouldn't wait to replace it. My luck it would leave me stranded.

 

[ScanmanSteven]

It's one of two things. Bad pump or connection. If the pump is grounded through the frame double check that connection.

 

[stock74]

Those are pretty much the same conclusions I came up with. Sounds like I am looking in all the right areas of concern. After I got the pump working the other day; I tried wiggling the connections on the pump and the ground wire on the frame neither of which caused the pump to die. I will try to investigate this more on the weekend. Thanks for the help!

 

[MarsChariot]

Or like me, it's a sign that your tank is out of gas. I went through all of what you are saying last week. Then, finally had a brainstorm and decided the tank was emptier than I thought. Add a couple of gallons, and, vaarrooom!