Quadrajet secondaries not opening

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DoubleV

Royal Smart Person
Feb 25, 2011
2,154
406
83
Medina Ohio
Did you check to make sure the secondary lockout was functioning properly? Going on what little info we have it seems the lockout may be simply sticking.
 

itsnicyo

Apprentice
Oct 8, 2013
56
4
8
Tampa
Thank you for your response! I think we are on the right track... The tab isn't broken off but it does appear to be bent to the left. So do I just grab some needle nose pliers and bend the tang?

 

techg8

Master Mechanic
Feb 29, 2012
475
342
63
So that bent finget should rotate back with the throttle arm and at some point contact the tab to the right, which in turn activates the secondary link and opens the secondary throttle blades.

I would use a needlenose pliers and bend the secondary tab towards the front of the carb, making the finger contact it sooner. Adjust small amounts at a time until the secondaries open a full 90 degrees when the primaries are at 90 degrees.

If you need to straighten out that bent finger for whatever reason thats fine, but its the interplay between the two that sets when the secondaries open and how far. Play with it til the secondaries open when and how far you need.
 

itsnicyo

Apprentice
Oct 8, 2013
56
4
8
Tampa
Ken thanks for your help, this has been bugging the crap out of me! Didn't want to put a bunch of money in the carb because I'm removing the computer when I swap engines.
I'll make sure to let you know how it works. Thanks again!
 
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