I had a mechanical fuel pump with the filter built into it. Now I have a new fuel pump without the filter built into it and my fuel bleeds back into pump and into tank. Is this normal with this kind of pump? It takes 10 cranks to get the fuel up to carb to get it started. It sucks.

Michigan Rick

(I have a 54 F100 with new 302 and new pump and new,new new)

 

Those pumps should be interchangeable. It sounds like one of the disc valves in the new pump isn't sealing properly, possibly due to a bit of foreign matter.

However, even so, the carburetor fuel bowl can't drain back into the fuel line, since the needle valve is either above or close to the top of the fuel level in the carburetor. So you may have another problem, like a leaky carburetor gasket. What kind of carb is it?

I installed one of those fuel pumps with the filter built into it on my 1969 engine because that big filter can hold a huge amount of crud (like rust from an old tank) and still pass fuel. The tiny stock inline filters were regularly plugging.

Also, for those who like to fix things, these early pumps can be taken apart to replace the diaphragm when it goes.

 

Sorry.....I have a new Edelbrock 500 .....the fuel from the filter between the carb and the pump bleeds back down to the fuel pump....it's clear so I can watch it bleed back down. I crank the starter for ever to get fuel up to the carb......so I usually dump a little gas in the carb to get the fuel pumping up to carb.......it pumps forever if I don't prime it to get the fuel started...

Any ideas?

 

Those clear filters will often retain trapped air indefinitely. This could be what is happening in your case, and the air pocket gets smaller when the fuel is pressurized by the fuel pump, then expands again when the pump stops pressurizing it.

Before starting the vehicle next time, check for fuel in the carburetor by working the throttle linkage while looking down the bores to see if fuel squirts out the accelerator pump circuit.

 

No matter what pump you have, there should always be a full bowl of gas in the carb after you shut the engine off, which would allow for fast startups. It should never take more than a few (2-5) pumps of the accelerator pedal to get a carbed engine started. If you're having to grind the starter to death waiting for fuel pressure something else is wrong.

 

Sand Man has said it well.

 

Have a good look down the carb after you shut it off , see if you see any fuel leaking into the intake ....Lew

 

It is a good thing, it primes the oil in the engine before it fires the engine likes it the starter might not. Get a lifetime starter from Oreillys & you will have a long running engine.

Unless your washing the walls down in the cylinder bores.
A new Edelbrock can't leak the fuel out. Is it flooded? Pull a plug & see if gas is shooting out of the plug hole when you crank it/

 

there should be enough fuel in your floatbowl to start the engine. it will be full when you cut the engine off. take the air cleaner off and look down the carb while you push your throttle lever by hand. if it does not squrit gas into the ventury you have a carb problem. if it does squirt gas, give your peddle a couple of pumps before trying the starter.

 

Another possibility may be fuel percolation, where some of the fuel vaporizes out of the carb due to engine heat after the engine is shut off. Since the fuel pump is no longer supplying fuel to the carb, the fuel level in the bowl can drop due to it evaporating, causing hard starting. My truck used to do this right after I installed an Edelbrock carb. I put a plastic 4 hole insulator between the carb and intake and have'nt had the problem since. Now it starts right up at the first twist of the key hot or cold.