Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
weird vacuum leak
Marx3:
I'm right at sea level. I used MS Polymer and laid a thin bead around the edge of the sealing area of the gasket, let it sit for 10 minutes and installed it. I haven't had time to get out to the car and check up on things yet. I must say I have absolutely no reason to believe, that the gasket is to blame.
You guys came with some interesting suggestions. I'll let you know as soon as I continue work on this car.
Marx3:
It turned out to be the secondary throttle plates not centered 100%.
At first glance they seated good and evenly, but after opening the throttle, they would not seat perfectly.
Seemed something was binding or what ever. Re-centered them and the problem went away.
Saw this once before on a Buick. That engine would not idle below 1200.
Ethan1:
--- Quote from: Marx3 on July 05, 2016, 07:32:13 AM ---It turned out to be the secondary throttle plates not centered 100%.
At first glance they seated good and evenly, but after opening the throttle, they would not seat perfectly.
Seemed something was binding or what ever. Re-centered them and the problem went away.
Saw this once before on a Buick. That engine would not idle below 1200.
--- End quote ---
Glad you got it figured out! ;D
Marx3:
Thanks.
Boy, did it drive me crazy. :-)
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