[rpmerf]

Quadrajet Problems:
http://www.florida4x4.com/tech/quadr...20Problems.doc

Quadrajet Tuning:
http://www.corvettefaq.com/c3/QJetTuningPaper.doc

Quadrajet Choke Setup:
http://www.vetteclub.org/warehouse/t...ke%20Setup.doc

Bunch of Quadrajet links:
https://www.florida4x4.com/tech/quadrajet/

I agree with WorkinLonghorn, sounds like accelerator pump. The accelerator pump gives a spray of fuel to help with starting and quick throttle changes. If the accel pump is not working, you will have a hard time starting, and it will lean out momentarily when you increase throttle.