I replaced the fuel pump and both fuels lines on my truck but cannot get fuel to enter the carburetor. Does anyone know how the resolve this?

A little info: the truck is a 1968 F100. It's a 6.4L 490. I replaced the old fuel pump with a new Carter fuel pump. The carburetor is a double barrel Edelbrock.

Thanks for any advice you have.

 

Is fuel getting to the pump???

 

Fuel is coming from the tank through the line. I can't tell if it's getting into the pump.

 

An in-cab tank, right? It's gravity fed after having a siphoning effect. Ya might have lost the prime.

Can you clarify what you mean by "both fuel lines".. Tank to pump and pump to carb?

Try this.... disconnect the line at the carb and put some fuel into the line. All the better if you can fill it up. The pump might needs some thing to push against. Reconnect and retry.

Btw, parts can be bad regardless if it is new.

 

Thanks. I'll give it a shot. And yes, by 2 lines I mean 1 like from tank to pump and another line from pump to carb. I appreciate your help.

 

What's the reason you changed pumps in the first place?

You may be sucking air at the rubber line going into the cab under the driver side.
This is where the two hard lines join together then going in the cab hard line.

Orich

 

Thanks. The reason I swapped it out was because I didn't think the carb was getting enough fuel from the the fuel pump and assumed the pump was bad. It sounds like it was actually fine and that my problems lie elsewhere.

 

If starving for gas causing the engine bog cough & spite. It can be a weak ign system.
Like Bad plug wires can be checked with an ohm meter. Or a weak coil.

Even your gas tank pickup tube can clog up at the end filter sock. And fuel filters need replacing. Many things to check.
Orich

 

My Mexican fuel gauge is never wrong..make yourself one, and you will never run out..

Baja

Hope you have a sense of humor amigo.. but this really works on my boat..


Just shove it into the tank, and Viola!

 

Ha Russ that reminds me of a stick my brothers used for his Model A first car.
And he still ran out of gas. On weekend nights cruising around.

We did have fun back in the Day as teens.

Orich

 

Made with a Fuel-proof marker? Good plan.

 

Is that bamboo stick E85 compliant, ISO 6000, gluten-free yadda yadda?

Orich brings up a good point, there is an oft-overlooked short hank of (by now) fossilized rubber hose underneath the cab that should be replaced., may be cracked or sucking air. This is a convenient spot to tie in an electric fuel pump, filter, drain or shutoff, etc. Maybe while old hose removed it would be convenient to blow out the lines fore and aft with compressed air. There should be strong pressure out of fuel line (3-5 psi say) and approx. one pint in under 30 seconds.

 

Ah yes the fuel pump under drivers seat. This free flow so don't need it on to get gas through it from manual pump.
Orich

 

im having the same issues... what is the block for, do you have one or two tanks

 

Yes amigo, that is a bamboo stick, with nuclear grade magic marker. Impervious to all known nonsense, and compliant to common sense, a rare earth commodity these days.

I found an old Bendix, magnetic fuel pump, off a Cessna, on Evilbay, for $70... I figure if it is good enough for aviation certification, its good enough for my Highboy. I see they are used on Porsche too. Guess they went out of the fuel pump biz, as they were too good.. My first one lasted 40 years, until some bandito liked it better than I did...

If your lines are clear, like Orich says, and your pump works, then there should not be a problem...?? Hope you find it..

Baja