201fireman Posted April 16, 2017 Share Posted April 16, 2017 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. Quote Link to comment Share on other sites More sharing options...
bigtankjones Posted April 16, 2017 Share Posted April 16, 2017 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. Quote Link to comment Share on other sites More sharing options...
201fireman Posted April 16, 2017 Author Share Posted April 16, 2017 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. Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted April 16, 2017 Share Posted April 16, 2017 Does it still do it if you disconnect the throttle cable Quote Link to comment Share on other sites More sharing options...
201fireman Posted April 16, 2017 Author Share Posted April 16, 2017 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. Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted April 16, 2017 Share Posted April 16, 2017 as Tony said, I would add another or a heavier spring Quote Link to comment Share on other sites More sharing options...
Mo's70MCs Posted April 19, 2017 Share Posted April 19, 2017 How about the fast iddle screw? Is the fast iddle cam adjusted properly? Quote Link to comment Share on other sites More sharing options...
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