Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
1977 Qjet coughs and sputters
Cliff Ruggles:
I'd try making adjustments to the spring tension and see if it improves.
Also make sure the choke pull-off is holding the secondary flaps tightly shut at idle and no slop in the linkage. The pull-off should open in about 1.5 to 2 seconds from compressed to fully open. Also make sure that it is holding vacuum.....Cliff
stushug:
I checked the pull-off and the linkage is fine, it holds the flaps fully closed with no slop. It is holding vacuum, but I did see that when I applied throttle, it went from compressed to fully open almost instantly.
As far as the tension spring, I'm not sure where a good starting point would be so I'm not sure if I have it too loose or too tight. If I started at no tension, is there a number of turns or partial turns as a general start? Or maybe using clock numbers such as one or three o'clock from zero tension?
Cliff Ruggles:
but I did see that when I applied throttle, it went from compressed to fully open almost instantly.
It should open much slower, about 2-3 seconds from closed to fully open once you go to full throttle......Cliff
stushug:
Does that mean mine is bad, or is there a way to adjust it? If it needs replaced, I assume you sell them?
stushug:
--- Quote from: Cliff Ruggles on June 27, 2017, 05:00:38 AM ---but I did see that when I applied throttle, it went from compressed to fully open almost instantly.
It should open much slower, about 2-3 seconds from closed to fully open once you go to full throttle......Cliff
--- End quote ---
Does that mean I need to replace it, and do you have replacements? Thanks.
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