Edelbrock throttle not returning all the way

[201fireman]

I have an Edelbrock 800 AVS. I rebuilt it and now it runs beautiful but the throttle will not return all the way. It comes back to very close, about 1100RPMs but I can then push it manually back to about 850. I don't believe the linkage is stuck or the plates are binding or hitting because if I shut the car off, I can literally watch the throttle linkage settle the extra 1/16" immediately. Then when I start it, it is back to normal until I rev it again. I also backed the choke off all the way while it was at the "high" idle and that didn't help either. I took the carb off and checked everything and it all seems good. Any thoughts?

 

One more thought, after manually pushing it back to the 850RPMs, when I back out the idle screw all the way, the car slows down and dies, which tells me again that I don't think anything is binding.

[bigtankjones]

My Edelbrock 650 I have on the firebird does the same thing. I Just added a extra return spring to pull it back. I bought my carb as a remanufactured carb off Amazon.

[201fireman]

I promise I wasn't the one who rebuilt the one you bought lol! This bugs me because it didn't do it until I rebuilt it.

[Sam (Bones)]

Does it still do it if you disconnect the throttle cable

[201fireman]

Yes, I unhooked the throttle cable as well as the kickdown cable so there is nothing hooked to the carb and it still does it. Like I said, when you shut the car down, it drops the rest of the way right away.

[Sam (Bones)]

as Tony said, I would add another or a heavier spring

[Mo's70MCs]

How about the fast iddle screw? Is the fast iddle cam adjusted properly?