Cliff's Quadrajet Parts and Rebuild Kits
Quadrajet Problem Solving => Diagnose a Quadrajet carburetor problem => Topic started by: twilloug on June 07, 2013, 10:19:12 PM
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So the carb is rebuilt and on the car. I am having an issue with high idle. It has a manual choke and I choke the car to start it. When I pull the choke off the engine wants to rev way up. I didn't mess with any adjustments on the car after the rebuild. Checked the primary shaft and it looks good. Any ideas? Do I need to re calibrate idle mixture screws?? Any other suggestions?
I did take pictures of the choke setup before rebuilding and I have verified that it is put back together properly.
Thanks for your help.
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im guessing your still on the high idle cam. try touching the accelerator a tad after you pull it off choke and see what happens.fwiw
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That was the first place I checked. I tap the gas peddle and throttle goes higher instead of falling off. Took pictures of manual choke mechanism when I took it apart to make sure I got it back together right. Going to mess with it today...will update on what I find.
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So I pulled the carb off today and I think I found the problem. The base gasket between carb and manifold has a 3/8 wide long opening that goes across the front of the primaries. This is allowing air into manifold. Trying to find the right gasket tomorrow.
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Sounds like you are missing the stainless steel plate. The gasket with the cut-out goes down first, then a stainless steel (thin) shim gasket against the carburetor.
We stock them new......Cliff