Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

350 pontiac

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cris85:
thanks cliff!
at the iddle, it's ok!
how fine the good idle bypass air hole?

cris85:
i put this in my other car ( firebird 1968 400 th 400, original ignition) and the vacuum problem doesn't come back!
the 1968 firebird run very well!
why does it run bad with the HEI ignition in the 1978 firebird???
thanks

Cliff Ruggles:
Much lower compression engine and larger cam in it.  This produces less signal at idle and low speeds......Cliff

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