Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

initial startup

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1971GTO:
Installed the rebuild yesterday.  Initially I didn't want to have a bad mishap so I left the coil lead off; also I didn't expect to get fuel to the carb so fast.  Choked, I cranked for 2 bursts of about 4 seconds each, noticing that gas is coming up out of the bowl vent to the air cleaner.

I then tried to fire up with the coil wire on a burst or two.  No kick over, still gas coming out of the vent.  After a while I just shut the hood to think this situation over.

Today, I'm hesitant to do too much more than the completely obvious with it, and will re-check some things, but stil...................

Is it simply flooded?  Why would gas be coming up/out of that front vent?

I don't wanna' be cranking, cranking, cranking today when I shouldn't and I'm hurting things more.

Please save me here guys with ideas/solutions!  Cliff?

Schurkey:

--- Quote from: 1971GTO on March 28, 2010, 09:00:34 AM ---I cranked for 2 bursts of about 4 seconds each, noticing that gas is coming up out of the bowl vent to the air cleaner.

I then tried to fire up with the coil wire on a burst or two.  No kick over, still gas coming out of the vent. 
--- End quote ---
The needle 'n' seat is not controlling the fuel level in the bowl.

1.  Float sunk?
2.  Needle 'n' seat defective or dirty?
3.  If this is a Holley, is the O-ring on the outside of the needle and seat assembly defective?

1971GTO:
Thanks,

I haven't done any thing, except turn it upside down a time or two since getting it back from Cliff though.  Mostly it's sat on a shelf.

What's a solution to move forward.............Cliff?

Cliff Ruggles:
We test all carbs set-up here on a real engine with 7psi fuel pressure for 30 minutes prior to shipping.

If possible crank the engine without fuel flow to the carb until the engine fires, and runs the carb empty.  Allow it to re-fill on the next start-up.  This should clear anything that could be stuck between the needle/seat.

It sounds like something is stuck in the needle/seat assembly not allowing it to control the fuel level....Cliff

1971GTO:
Will try at earliest convenience, could be this next weekend though.

Appreciate the followup Cliff,
Anxious.

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