Carb leaking

[veehome911]

Alright so now I'm at wits end!! I rebuilt my 2bbl Rochester carb because it was leaking out what I think is the float over flow? ( it's a hole at the top of the carb. It was just pissing out gas.. Now at first I thought the floats were stuck open so I pulled it apart adjusted the float put in a new needle and seed and replaced all the gaskets.. Now I bolted it all back up and what do you know! It's still doing it... Soooo now I'm thinking maybe it the new fuel pump I put in? I picked up an entire fuel tank assembly at a rocking yard from what I think was a Chevy Oldsmobile. 94 I think. So is it possible that the fuel pump just had to much power and that's why it's leaking? Or is it still a carb problem?

Thanks in advance for the answers!

[cjbiagi]

Sounds like you have a fuel pump for a fuel injected car which is WAY too much pressure. Those pumps put out 40 lbs or so compared to 5-7 pounds for a carb.

[veehome911]

is there some kind of regulator i can put in the fuel line to drop it down?

[cjbiagi]

I am not aware of one that is designed to drop the fuel pressure that much. Why not just get the correct pump?

[veehome911]

I really don't want to drop the tank again and try and find another pump that will work.. Would something like this work? http://item.mobileweb.ebay.ca/viewitem? ... 2597717829?

[cjbiagi]

I don't know but that regulator is still designed for a fuel injected application. Sounds like it may lower the pressure possibly during idle or cruise situations (high vacuum). Dropping the tank is pretty easy as long as it's relatively empty.

[Monzamaddogger]

With that regulator you would need to set up a return line to the tank for the extra fuel. I would think it would be easier to replace the pump than fabricate a return line. Just my opinion.

[Wizeguyrc]

I agree with the opinions you're getting so far. You can regulate it down, but as pointed out, fabbing up a return line and adding the regulator sounds like way more work than switching out the pump.

[Monza Harry]

I am agreeing with what Clyde (and others) was saying that regulator is to lower fuel pressure at lower speed/power requirements that regulator has a port for vacumm/boost reference (the angled fitting at the top) so the larger capacity injectors will work at lower fuel delivery rates, idle, cruise, coast, etc. this may still work I just couldn't say for sure one way or the other. I am contemplating a similar fix for a different fuel pump issue but with the lower pressure TBI pump (15# and from the online pictures it should be a bolt in to the tank sender/holder) which should be within the relm of a holley bypass regulator and I want MPI FI some day (you know when Money$$$$ starts falling from the sky) so I will need the return line eventually just going to have to instal it now. Harry

[firebird77clone]

Did it start leaking before or after you replaced the pump?