Hello there cats and kittens. I replaced my intake manifold gaskets on Saturday and now the car won't idle. It will start and run for the amount of fuel that I pump into it from the accelerator, or if I keep my foot on the gas it will stay running but it won't idle. When I took off the intake manifold I left the carburetor on top of it and turned it on its side to clean the gasket material from the bottom of the intake manifold could I have done something to the carburetor by turning it on its side?

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The floats in the carburetor might have been disturbed. You might have to remove the top of the carburetor to inspect that the floats are working properly that might be your problem... check your carb linkage, hoses,etc.

Sorry I guess I should have mentioned I did that. I noticed when the top was off that the little metal Keepers that connect the flows to the pins were missing. I found an old rebuild kit and installed them before I put it back together.

Glad you thought of it and found it.

Last time I had my intake off, the car wouldn't idle after I got it all back together. In my case I noticed a vacuum leak sound and discovered that I forgot to connect the hose for the brake booster to the manifold. Hopefully yours will be an easy fix too.

I'm pretty sure I put them all back on but I will double check that when I get home thank you.

If the car runs as it should when you use the gas peddle your idle adjustment is now to low after the repair 

Increase you idle adjustment until you get the car to run and hold at an idle  

 To low idle adjustment will shut the engine down 

Do check all connections and hoses for possible issues first 

Turning the carb on its side should not effect the way it should be working if nothing else was done to it 


Joe D 

I do not understand your post about the pins so explain that to me if you can 

Enjoy and 

It's still not right. All I did was take the intake manifold off with the carburetor on top of it turn it on its side to clean the gasket Material off the bottom of the intake manifold and reinstall it. If I pump the gas it will run and if I grab the accelerator Rod coming from the pedal and keep pumping it'll run but only for a while then it'll pop & hiss and stop running. I took the top off the carburetor and check the floats and they're right. I'm at a loss PS I checked all of the vacuum hoses 2 and their connected correctly

You have a leaking or stuck float, or a bad seat to the float valve. Change out the brass tube and seat since you have an old kit.  The tubes and seats are matched, so dont try to cheat and just do the seat.

Shake the float to see if gas is inside a float.

you're getting fuel in the accelerator bowl, but none is coming into the jets or the idle circuit. 
were the bowls full of gas when you took the top off? 
if so, it's the most likely thing that when you inverted the carb, all of the dirt that's always at the bottom of an antique carb's bowl went into your jets and your idle passages and clogged them.  

From Mark’s post feels like a carb rebuild is in the stars as what he is saying makes a lot of good  logical sense 


I spoke to a couple of Cadillac member's directly and we've come to the conclusion that the issue more than likely is with the intake manifold gasket. The shim I was given to block the choke port is probably creating a gap which is letting in air. I'm going to remove the intake manifold gasket and use red RTV silicone and see if that works



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