Quadrajet Problem Solving > Quadrajet Parts and Numbers

Choke Pull Off Vacuum Amount

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firebird_fast:
Hi, what is the correct amount of vauum I should see when I test the choke pull off?  Thanks.

Shark Racer:
Pump it up until the arm is completely retracted. At that point, it should hold vacuum.

firebird_fast:
I'll give it a shot, thanks.

Ethan1:

--- Quote from: Shark Racer on July 15, 2013, 06:23:41 PM ---Pump it up until the arm is completely retracted. At that point, it should hold vacuum.

--- End quote ---

 I agree with, Steve. At least, that is the way I check them.

Cliff Ruggles:
Just compress the unit and hold your finger over the supply.  If it doesn't hold it's not any good.  They used a lot of different pull-offs, which require different amounts of vacuum to fully apply them. 

Some later units have a "bleed-off" hole in them, so they will always fail a vacuum test. Make sure to hold a finger over that hole as well when testing them.....Cliff

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