Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Rebuilt--fires once, won't restart 7044203

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Kenth:
Starting a cold engine with carb beginns with pushing the throttle once, then remove foot.
This settles the choke in closed position.
Turn the key and engine starts and p-o opens the choke blade 1/4". Three minutes later the choke is fully open by the bimetal spring in choke on manifold.
I noticed on your last pic there is a vaccum tube missing in the front piedestal for the p-o bracket. This is a vacuum leak if not corrected.

67elco:
In the last photo if you look closely, you can see that hose was disconnected for testing the break and the clear hose is attached. Once I was done, the line was reattached.

When depressing the throttle pedal once, the lever is not moving the choke into the correct position. Based on the photos I attached, is my linkage assembled wrong? And if so, what can I adjust to fix that? I'm not sure that's the entire problem with it running poorly, but I'll try anything at this point.

Kenth:
In this pic you can see the vacuum tube your carb is missing.
HTH

Kenth:
I may be wrong but it looks like the rod from choke to carb is too short.
When choke is closed the rod should be at the bottom of its travel moving upwards when heated.

67elco:
Fortunately I have a spare quadrajet (same model # as mine) I was able to transfer that tube over and I capped it with a plug.  It cranked over pretty quickly, but it ran way worse (didn't think that was possible), but with my vacuum gauge plugged in, it was showing near 5 inches/hg, whereas before it wouldn't show any vacuum at all. 

Again, screwing in the idle screws down to 1.5 to 2.0 turns did nothing. With the choke closed, it won't restart, but if I wedge a screwdriver in the choke flap, it did crank over and fire after a lot of cranking, but again, ran horribly.

I really don't want to hurt this motor, should I pull the carb back off and go through it again? Any benefit in using a smoke machine to look for vacuum leaks that are not from the carb since I can't run the motor?

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