Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Quadrajet Carb 7036202 C6 DH

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twilloug:
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.

429bbf:
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

twilloug:
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.

twilloug:
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.

Cliff Ruggles:
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

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