Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

initial startup

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Cliff Ruggles:
That's about the worst that could be wrong.  It's possible a small peice of debri got into the needle/seat assembly when we installed the fuel filter housing and new filter after the test run.  We use a different filter housing with an AN fitting on it for the running test.  Shutting off the fuel supply and allowing the carb to empty, then re-fill will usually clear anthing that found it's way into the needle/seat assembly....Cliff

1971GTO:
Just fired up!

This fix worked as you specified!  Runs smooth at idle, will do the regular tune up re-checks here today and get some clean fuel/go for a spin.

Cliff, only trouble seems to be a real tight/sticky choke, had to manipulate it by hand initially, and the stove won't open the choke flap up; like it's not strong enough.

Appreciate it,
Mike.

Cliff Ruggles:
Use some WD-40 or light oil on the choke fast idle cam and related parts.  Make sure the throttle is fully depressed wo the linkage on the primary throttle shaft moves out of the way to allow the choke to fully employ. 

We don't have any way to test divorced chokes on our test engine, they have to be set up on the original application with the stock parts.  All items related to the choke require bending links to get them set correclty, aside from the fast idle speed screw.  Although somewhat primative, once they are correct set-up they work fine.....Cliff

1971GTO:
Cliff, I think the choke flap itself is working alright; I removed the divorced choke from the manifold crossover to inspect.  When I took it off, the choke flap works fine by hand.

I think the tightness stems from the lever in that device rubbing on the side of it's metal cover; I need to add a washer to one side to keep it stood away from the side.

Should do it!

1971GTO:
That did it, now just for some fine tuning via other threads here.

Great product you delivered to me Cliff!

Many thanks,
Mike.

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