Should the engine die when i close both idle mixture screws on an e-brock carb? I closed both of them down and it dropped the idle speed from 800 to about 600rpm. Would this be a symptom of a vac leak somewhere in the carb or gasket??

If you turn the both screws all the way in yes it will kill the engine. You are basiclly cutting off all the full at idle.

No this is not a system of a vac. leak.

What is the problem you are having or are you trying to set the carb up????

What i'm saying is that i did close them all the way and the engine didn't die...it just reduced the idle speed from 800 to 600rpm. Since it didn't die would that be a symptom of a leak?

I'm sure the blades are not open much at all and it should be in the idle circuit..but i will double check that. Initial timing is 15deg.

This is the P.O.S 750 eddy carb that im dealing with. I do have the orig AVS that i'll probably swap on and see how it does.

I just pulled the car out of storage for the last two years and am just making sure everything is ok. Thanks for the replies.

But yes if you screw even one of the idle mixtures screws in all the way the engine should die if everything else is right. IE no vacuum leaks and the throttle blades arent open past the idle circuit slots. You got a factory service manual? It explains how to set the idle screw on a fresh rebuilt carb and the procedures would be the same for the Eddy as the stock Carter. That way you know your not to far open to be getting were your running on the main circuit versus the idle circuit. Now depending on the year the idle mixture screw system could be alot different. Like for instance a 69 AVS idle mixture setup is not going to be apples to apples but a FSM for lets says a 1967 AFB on a 440 would be.

Just a note here. When you screw those needles in just barely let them touch the seat. don't screw them in tight or you can possibly groove the brass needle rendering the needle virtually useless.

Thanks for the info
I do have a service manual. I'll dig it out and read up.