Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

7041251 tuning...

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Kenth:

--- Quote from: Tancuda on December 16, 2025, 08:55:25 AM ---Ok thanks will check on this. Idle needle holes, you mean the holes behind the mixture screw ?

And I just realize that on the picture, my primary throttle blades are drilled !!

I saw a lots of quadrajet on the web, but never saw drilled plates (stock).

Any ideas ?

--- End quote ---

Most, if not all, 1971-74 Olds Qjets has the bypass .110" holes in the primary throttle blades. And, yes i was referring to the holes behind the mixture screws.

Tancuda:

--- Quote from: 77cruiser on December 16, 2025, 09:37:46 AM ---I'd think about 160 for a stock engine. Maybe the cam was installed retarded.

--- End quote ---

Good thanks

Tancuda:

--- Quote from: Kenth on December 16, 2025, 10:31:51 AM ---Most, if not all, 1971-74 Olds Qjets has the bypass .110" holes in the primary throttle blades. And, yes i was referring to the holes behind the mixture screws.

--- End quote ---

Good to know thank you.

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