Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

7027263 carb. no responce on idle mixture screws??

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Mr.Pontiac:
Sure could use some help on this one Cliff!!

Mr.Pontiac:

--- Quote from: Mr.Pontiac on July 10, 2013, 12:35:43 PM ---idle air bleeds airhorn, are  .055 holes under idle screws same .070 and base plate hole bypass is very small .030. Going to see if springs are coil binding, did not cut anything off them.

--- End quote ---

Mr.Pontiac:

--- Quote from: Mr.Pontiac on July 10, 2013, 12:35:43 PM ---idle air bleeds airhorn,  .055 holes under idle screws same .070 and base plate hole bypass is very small .030. Going to see if springs are coil binding, did not cut anything off them.

--- End quote ---

Cliff Ruggles:
The 7027263 should have very small upper idle airbleeds in the airhorn, closer to .040" than .070".

There is no idle bypass air in the baseplate on those units....Cliff

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