Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Freshly rebuilt quadrajet flooding from top of carb

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gregcarter:
Thanks, I'll order them on Monday.
I suspect that since you didn't say that I should change anything else that I will not be changing any of the other components.
I also didn't mention that I'm looking for economy, so hopefully this setup will be adequate.
In many of the pictures in the book, I noticed a dam between the accelerator pump and the fuel bowl.
My unit does not seem to have one, it is just a big void. Is this common?
Thanks, G. Carter

Cliff Ruggles:
If you are having issues right after a "rebuild" I would install one of our kits as well.  Then you will address all the components related to flooding, and get parts in there that will hold up in this new fuel......Cliff

gregcarter:
ok, I received the main air bleeds.
They appear to have a .126  od.
What size should the holes they fit into be?
The upper ones look fine, it's the lower ones that may be too small.
Thanks,
G. Carter

Cliff Ruggles:
They fit the airhorn and main casting on all models that used 4 main airbleeds.....Cliff

gregcarter:
Ok, I finally got this one back together, filled the floatbowl on the bench, installed it the truck, started right up, but I had to hold the choke almost closed to keep it going.
I let it warm up like this, thinking it would get better, opened the idle mixture screws out, thinking it would get better, raised the idle speed up, backed out the mixture screws some more, but it still ran lean, lean lean.
I closed the choke plate almost all the way, and the idle came way up, and smooth.
I shut it off to ponder the problem.

The original problem was stalling at stop signs, and a super lean idle. (not flooding after a rebuild, as this thread heading implies)

In the carb reconstruction, the idle tubes were replaced to .035.

The float was replaced and raised to .025, it had been at 7/16ths.

The power piston was stuck up with about 1/8th inch travel from a bunch of gummy stuff down around the adjustment screw.
This model PP (Edelbrock 1902) has a horizontal adjusting screw between the mixture screws.
When I set it up I turned the screw in until it just barely lifted the PP as a starting point, as I had no information on where to set it.
I suppose I could try raising it a little, to see if more fuel will get to the idle system, but I thought I read somewhere that jets and rods had nothing to do with the idle system.

The idle shaft was bushed.

The upper mabs were decreased to.042 from .052.

The lower mabs were increased to .042 from .110.

The carb body was dewarped, and the airhorn was sanded flatter than it was.

The body was filled with carb cleaner for 20 minutes, rinsed with water, blown out with air, then spray carb cleaner, and then air again.   

So that's where I'm at.

I thought I would take a vacuum reading tomorrow, but I don't know what it should be for this setup.
I thought I would test for manifold leaks again to see if I missed any.
I also thought that perhaps the idle downtubes may not have been cleaned adequately as the carb cleaner never got in there, even though I sprayed and blew them out several times.

I appreciate the help and recommendations you've given me so far, and I'm looking forward to your response.
G. Carter

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