Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Carb has been rebuilt with Cliff's recomended parts and kit .

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bober:
Just checking in with you guys before I start adjusting things ! 17080272 q/jet on my 350 pont bird and it has been rebuilt . So far I've adjusted the idle mixture screws and timing back and forth and driving it a few miles . It actually runs well all but when it's accelerated at a stop quickly it bogs down ,picks up again after that and goes good . Just can't get on it .  The instructions I have from the guy that rebuilt referred to this type of acceleration may need APT screw turned 1/2 turn rich or lean . Is this the direction you would go ? Just looking for 2nd. opinions .Thanks , I don't fell comfortabl about turning screws !

Andyman:
Hello, I am new here myself and searching for similar answers. I see that you posted 2 days ago and nobody responded yet. I'm no expert, but I have read quite a bit about how q-jets work. From what you describe, I think you need to know what is happening to the power piston when the throttle is opened. If you do in fact have an adjustable APT then I think you might want to record where the initial setting is before you make any adjustments. Mine is blocked off at the factory.

bober:
Cliff's a busy guy and doesn't have alot of time for answers so sometimes it takes awhile to get one . Yep ;I do infact have one but I'll probably make the adj. and go from there .If it gets to bad I can always get a Holley LOL ! I've been making notes on all the adj. I've made sofar and this is the last one I can do , So it'll have to do or I'll have to go back to drawing board . The guy that rebuilt it has been giving me advice also . I wanted a second opinion as I've been trying to get this thing running rite for a long time ! Thanks ,

429bbf:
bober are you getting a good pumpshot when you hit the pedal? is the rod hooked on the inside or outside hole?go ahead and screw the apt up a couple of turns and see what happens .is your spring strong enough to lift the needles as soon as vacumn drops ? it all works together in unison.hope im not confusing you.

Cliff Ruggles:
APT has nothing to do with heavy throttle operation, just light throttle cruising.

Check accl pump shot, and air door tension if you are having trouble when the secondaries come in.....Cliff

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