Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

301t Won't idle

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canadian nascar:
Hi,

so i put in the new accel pump, .135 needle and seat and took out the #77 jets and put back the stock #70s. now the response is good crusining  but as soon as i put the throttle down it hesitates 2-4 seconds and is fine there up. what do i do?

i am thinking i should try and put the #75 jets in to see what that will do?

the idle is excellent now

thankyou kevin

canadian nascar:
i am working from recipe # 2 as instructed by Cliff

kevin

Cliff Ruggles:
Describe "put the throttle down"?  Going to full throttle from a standing stop, part throttle, heavy part throttle without the secondaries, etc?.....Cliff

canadian nascar:
Hi
going full throttle at any position, did some reading and tried adj. the secondary a/v spring tension and that fixed the problem.

tightend the screw 1/4 turn from where it was.

thankyou kevin

Cliff Ruggles:
Good news, and one of the best features of the Q-jet....FULLY adjustable for secondary airflap opening rate, without taking the carb apart!.......Cliff

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