Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Freshly rebuilt quadrajet flooding from top of carb

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gregcarter:
Ok, I removed the throttle body and saw that full manifold vacuum was being applied to the bypass opening in the carb body from a cutout in the base gasket. Whoops......
You are correct once again. I need the right gasket. I better order your float as well, and any other part you can think of. The list of your parts I have is above on the previous post.
I'll call you in the morning.
Thanks for your help,
G. Carter
Edelbrock 1902

gregcarter:
Thanks for the gasket.
I should have ordered a base gasket as well, just to make sure it was right, as it looks like there are more than 1 style.
The one I used has a flat area at the front that covers but does not seal the area of the pcv vacuum inlet. My other base gasket is open in this area and seemed wrong.
The motor ran a lot better with the new throttle body gasket, but I still did not have mixture screw control.
I poked around the secondaries, stalling the motor just by tapping the air valve, so I thought there might be some unwanted vacuum in there, so I removed the throttle body and detected small particles of dirt holding the secodaries open slightly. (I drive on dirty construction sites).
I cleaned and reindexed the plates and reinstalled the carb, sealed the airbox and now have control with the mixture screws.
So off to the smog shop I go.
I'll let you know if it passes.
G. Carter

gregcarter:
Ain't over yet.
Drove the truck to work (50 miles), seemed like the idle was low, so I raised it up a little and the stink and rough running was back.
I turned in the idle screws all the way, the idle came up, it stank, so I drove it home.
I looked down the primary side and it was dripping, tapped the air valve and it stalled. Looked down the secondaries and they looked clean
I opened the air valves and secondary vaives and sprayed cleaner around, and started the motor.
Wouldn't run 'til I opened the idle screws, so I set them and lowered the idle.
Open the air valves all the way, and the idle stayed almost the same, I think it dropped a little.
The secondaries must not be sealing all the time.
They looked and felt perfect when I had them apart yesterday.
I'm detailing out my air intake system, I can't think of any other thing to do.
Gregory Carter

gregcarter:
Here's another dumb one.... the air filter was too short allowing dirty air over the top into the nice clean carb.
Took care of that and took it to the smog shop.
Failed on nox, probably carbon buildup, egr blocked(which it is) dirty catalytic converter, or running hot. I'll work on these.
The smog tech said he thought the carburetor  was working fine, even though I was getting a little choked up on fumes in his small shop.
That's all for now.
G. Carter

gregcarter:
Took off the manifold, and cleaned the egr passage, reassembled it all, and took it to the smog shop and it passed finally.

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