Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
So Much For My Expensive Custom Carburetor :(
Frank400:
Or the fuel pressure is sky high from an autoparts store fuel pump (thanks to the Chinese quality control) I've seen this quite a few times, especially in the last 5 years or so. Makes a perfect carb flood badly.
jberenyi:
Fuel pressure is good. I checked the needle and seat. Put it back together. Ran a while and starting flooding again . This carb is a piece of shi@. Cliff better give me my money back on this. I'm going Edelbrock. Should have went this route in the beginning. Four months and this is what I get. You should have seen the surface rust inside and the air nozzle tubes were caked with residue plus one has damage on it. Garbage in garbage out.
77cruiser:
What is the fuel pressure?
jberenyi:
5.5 psi. Opened her up and noticed there is a slight nick on needle valve (aluminum part). Also, horse shoe clip that holds the float in place is much too high and is causing the airhorn to mash down on the clip and gasket really tight. This is not good and there is no reason for this. I'll fix these and see how it goes.
Cliff Ruggles:
The carb is not "defective", passed every test with flying colors before leaving here.
We have very, very few issues with work we do here because we test them on a real engine and make sure they work correctly in all areas.
In building many thousands of them we haven't got a hand full of them back, and usually we end up finding nothing wrong with the carb and narrow down the problems to something on the users end.
Could have been damaged in shipping, a really hard hit even though it doesn't put a hole in the box can bend the linkage parts on the choke side and cause issues. There may also be other issues not related to the carburetor or distributor.
Sure sounds like there is a big vacuum leak someplace, or the choke isn't opening up and getting it off fast idle.......Cliff
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