Fuel pump/flooding/psi?

[jdurant]

Friday I started smelling gas. Noticed a little trickle of fuel coming from the fuel pump where the two halves meet. So, I installed a new fuel pump--stock replacement for my stock 305 with new quadrajet. Now with the new fuel pump, the truck will barely start. It floods. I teed a pressure guage in the fuel line and it reads 8-0-8-0-8-0-8-0.
I think it should read like 4, right? And that is a constant 4 right?

[powerdriver 1958]

would think it would be closer to 6 lbs,Is there a chance that some dirt may have gotten through to the carb?

[jdurant]

Yes, there is a very good chance of that. It's a long story, but I thought I was over that problem, and had run enough fuel and carb cleaner through it.

It was running fine before I changed the fuel pump. Could this new fuel pump with the 8-0-8-0-8-0-8-0 psi be causing it to flood out. When you look at the guage, it should be constant, huh?

[powerdriver 1958]

What brand pump?There is a thread running with almost the same problem for cheap imported fuel pumps.

http://67-72chevytrucks.com/vboard/s...d.php?t=353676

[jdurant]

Originally Posted by powerdriver 1958

What brand pump?There is a thread running with almost the same problem for cheap imported fuel pumps.

http://67-72chevytrucks.com/vboard/s...d.php?t=353676

It is a besttest from o'reilly.

I have read Poke's thread. It really doesn't help me much.

What should the fuel pressure be? It should be constant at idle, right?

Now again, I am seeing 8-0-8-0. Is 8psi too much? Will that cause it to flood? I can actually see fuel coming out of the carb.
Am I seeing the pressure fluctuate because it is missing due to the flooding.

[asphaltburner]

Yo! My 600 Holleys' paperwork states that it is designed to operate at 5 to 7 psi. I have my regulator dialed in at 7 psi and runs perfect. Perhaps that will help for an FYI.
Fuel coming out of the carb is WRONG! Sounds like you may need a new inlet valve for your float bowl.
And the supply pressure should be constant.
Todd.

[jdurant]

Thanks asphaltburner. Yeah, something is definately wrong. Just trying to figure out if it is the brand new pump, or the brand new carb. I don't think I can get a good fuel press. reading because the carb wont allow it to run.