Fairlane514
Member
In my quest to fix my idle problem (stumble), it clears up and runs great with about half choke. This means to me lean or unmetered air getting in. I took my carburetor off again and this time i concentrated on the throttle shaft. When I rebuilt it the first time I did not install the new throttle shaft. I removed the old throttle shaft this time and measured it .247 thousandths just like the new one.
Taking a closer look at the bushing I could see it was well worn and the shaft wobbled significantly in the bore.
I have rebuilt many Quadrajet, Edlebrock and Holley carburetors and a loose throttle shaft bushing can cause a vacuum or unmetered air leak. I think this may be my problem and I found a new bushing online.
Alsp, my float level is correct and my mixture screws and.....Main meter 1 1/2 turns out, idle mixture is 3/4 out. Turning the idle mixture does little, all the way in and still runs better with some choke. Turning it out doesn't do much either.
I will report the findings, if any.
I just rebuilt the engine, and fired it today, it runs fine above idle, so again it leads me to a vacuum leak.
Taking a closer look at the bushing I could see it was well worn and the shaft wobbled significantly in the bore.
I have rebuilt many Quadrajet, Edlebrock and Holley carburetors and a loose throttle shaft bushing can cause a vacuum or unmetered air leak. I think this may be my problem and I found a new bushing online.
Alsp, my float level is correct and my mixture screws and.....Main meter 1 1/2 turns out, idle mixture is 3/4 out. Turning the idle mixture does little, all the way in and still runs better with some choke. Turning it out doesn't do much either.
I will report the findings, if any.
I just rebuilt the engine, and fired it today, it runs fine above idle, so again it leads me to a vacuum leak.