Fuel pump?

[yukondoit]

Would the fuel gauge be working if the fuel pump is out? Pulled up to a stop light, light turned green, yukon shut off. Engine turns over, it has half a tank of gas, but won't start. Any help would be appreciated, I'm currently broke down in north phx.... Anyone in the phx area?

 

[chauncey0337]

Yes, fuel gauge should work even if fuel pump is out. Sending unit is next to pump but it's a separate mechanism. Try to see if you have a pressure valve on fuel line under hood to check for pressure. Watch out for squirting gasoline.

 

[bankswood]

sometimes you can hit the tank a few times with a rubber mallet and it will energize the pump so you can drive it home.

 

[chauncey0337]

sometimes you can hit the tank a few times with a rubber mallet and it will energize the pump so you can drive it home.

Kind of like a starter motor.

 

[Rivieraracing]

That's exactly how mine went out months ago, rolled up to a stop sign next to my house, as soon as I pressed the gas it died on the spot!! After that, it turned over fine but sounded like it wanted to kinda start but it wouldn't, kinda like flooding a carb'ed motor!!
And yes, my gas gauge worked, like mentioned it's a separate item attached to the fuel pump!

 

[yukondoit]

Well I got a tow to a friends place... Now I have to figure out what the problem is. Check engine light is on, p0178 comes up. Which is basically the flex fuel sensor. Would that be a possible cause of it not starting? Would the sending unit cause it not to run also?

 

[chauncey0337]

I don't know much about flex but a bad sending unit shouldn't keep the truck from running.

 

[yukondoit]

Thanks for the responses.. I'm guessing its the fuel pump.

 

[bankswood]

you can check the fuel relay. it is in the fuse box under the hood. swap the relays around to see if it is a bad relay. probably not. These trucks have a history of bad fuel pumps. Don't go to the Stealer for the repair. He will quote $800-$1000. I bought a fuel pump assembly from Advance Auto for $275 and had a mobile mechanic install it for $175. The mechanic had done so many it was second nature to him. I helped him install it so I could learn how to do it. It's not nearly as hard as it sounds.

 

[yukondoit]

I'm here in phx for work, up to friday. Stressing big time over this, plus I have no tools with me, so me doing my own install is kinda out of the question.